GB50016-2014建筑设计防火规范_EN(1) 120页

UDCNATIONALSTANDARDOFTHEPEOPLE’SREPUBLICOFCHINA中华人民共和国国家标准PGB50016-2014CodeforFireProtectionDesignofBuildings建筑设计防火规范Issuedon:August27,2014Implementedon:May1,2015JointlyIssuedbytheMinistryofHousingandUrban-RuralDevelopmentofthePeople'sRepublicofChinaandtheGeneralAdministrationofQualitySupervision,InspectionandQuarantineofthePeople'sRepublicofChina\nNationalStandardofthePeople’sRepublicofChina中华人民共和国国家标准CodeforFireProtectionDesignofBuildings建筑设计防火规范GB50016-2014Developedby:TheMinistryofPublicSecurityofthePeople'sRepublicofChinaApprovedby:TheMinistryofHousingandUrban-RuralDevelopmentofthePeople'sRepublicofChinaImplementationDate:May1,2015ChinaPlanningPress中国计划出版社2014Beijing\nAnnouncementoftheMinistryofHousingandUrban-RuralDevelopmentofthePeople'sRepublicofChinaNo.517AnnouncementoftheMinistryofHousingandUrban-RuralDevelopmentonPublishingtheNationalStandard"CodeforFireProtectionDesignofBuildings""CodeforFireProtectionDesignofBuildings"hasbeenapprovedasanationalstandardwithaserialnumberofGB50016-2014andshallbeimplementedfromMay1,2015.Thereinto,3.2.2,3.2.3,3.2.4,3.2.7,3.2.9,3.2.15,3.3.1,3.3.2,3.3.4,3.3.5,3.3.6(2),3.3.8,3.3.9,3.4.1,3.4.2,3.4.4,3.4.9,3.5.1,3.5.2,3.6.2,3.6.6,3.6.8,3.6.11,3.6.12,3.7.2,3.7.3,3.7.6,3.8.2,3.8.3,3.8.7,4.1.2,4.1.3,4.2.1,4.2.2,4.2.3,4.2.5(3,4,5,6),4.3.1,4.3.2,4.3.3,4.3.8,4.4.1,4.4.2,4.4.5,5.1.3,5.1.4,5.2.2,5.2.6,5.3.1,5.3.2,5.3.4,5.3.5,5.4.2,5.4.3,5.4.4(1,2,3,4),5.4.5,5.4.6,5.4.9(1,4,5,6),5.4.10(1,2),5.4.11,5.4.12,5.4.13(2,3,4,5,6),5.4.15(1,2),5.4.17(1,2,3,4,5),5.5.8,5.5.12,5.5.13,5.5.15,5.5.16(1),5.5.17,5.5.18,5.5.21(1,2,3,4),5.5.23,5.5.24,5.5.25,5.5.26,5.5.29,5.5.30,5.5.31,6.1.1,6.1.2,6.1.5,6.1.7,6.2.2,6.2.4,6.2.5,6.2.6,6.2.7,6.2.9(1,2,3),6.3.5,6.4.1(2,3,4,5,6),6.4.2,6.4.3(1,3,4,5,6),6.4.4,6.4.5,6.4.10,6.4.11,6.6.2,6.7.2,6.7.4,6.7.5,6.7.6,7.1.2,7.1.3,7.1.8(1,2,3),7.2.1,7.2.2(1,2,3),7.2.3,7.2.4,7.3.1,7.3.2,7.3.5(2,3,4),7.3.6,8.1.2,8.1.3,8.1.6,8.1.7(1,3,4),8.1.8,8.2.1,8.3.1,8.3.2,8.3.3,8.3.4,8.3.5,8.3.7,8.3.8,8.3.9,8.3.10,8.4.1,8.4.3,8.5.1,8.5.2,8.5.3,8.5.4,9.1.2,9.1.3,9.1.4,9.2.2,9.2.3,9.3.2,9.3.5,9.3.8,9.3.9,9.3.11,9.3.16,10.1.1,10.1.2,10.1.5,10.1.6,10.1.8,10.1.10(1,2),10.2.1,10.2.4,10.3.1,10.3.2,10.3.3,11.0.3,11.0.4,11.0.7(2,3,4),11.0.9,11.0.10,12.1.3,12.1.4,12.3.1,12.5.1and12.5.4aremandatoryandmustbeimplementedstrictly.Theformer"CodeofDesignonBuildingFireProtectionandPrevention"(GB50016-2006)and"CodeforFireProtectionDesignofTallBuilding"(GB50045-95)shallbeabolishedsimultaneously.AuthorizedbytheResearchInstituteofStandardsandNorms(RISN)oftheMinistryofHousingandUrban-RuralDevelopment,thiscodeispublishedanddistributedbyChinaPlanningPress.MinistryofHousingandUrban-RuralDevelopmentofthePeople'sRepublicofChinaAugust27,20141\nForewordAccordingtotherequirementsofDocumentJianBiao[2007]No.125-“NoticeonPrintingtheDevelopmentandRevisionPlanofNationalEngineeringConstructionStandardsandCodes(theFirstBatch)in2007”andDocumentJianBiao[2009]No.94-"LetterontheCorrectionofRevisionPlanfor'CodeofDesignonBuildingFireProtectionandPrevention'and'CodeforFireProtectionDesignofTallBuilding'",issuedbytheMinistryofHousingandUrban-RuralDevelopment,thiscodewasformulatedbyTianjinFireControlInstituteandSichuanFireResearchInstituteofMinistryofPublicSecurityjointlywithotherorganizationsconcernedthroughintegratingandrevisingonthebasisof"CodeofDesignonBuildingFireProtectionandPrevention"(GB50016-2006)and"CodeforFireProtectionDesignofTallBuilding"(GB50045-95).Duringtheprocessofrevisingthiscode,therevisiongroupfollowedtherelevantnationalprinciplesandpoliciesincapitalconstruction,implementedthefirepolicyof"preventionfirstandcombiningpreventionwithfire-fighting",learnedthelessonsfrommajorfireaccidentsinChinainrecentyears,earnestlysummarizedpracticalexperienceinfireprotectiondesignofbuildingsandscientificandtechnicalachievementsinfire-fightingathomeandabroad,madedeepresearchesonthenewconditionsandproblemsinengineeringconstructionandthedifficultproblemsinthecodeimplementation,seriouslystudiedandabsorbedexperiencefromdevelopedcountries,carriedoutalotofsubjectstudies,technicaldiscussionsandnecessarytests,solicitedwideopinionsfromdesign,production,construction,scientificresearch,educationandfiresupervisionorganizations,etc.andfinalizedthiscodethroughreview.Thiscodecomprisestwelvechaptersandthreeappendixes,covering:requirementsforfirehazardclassificationofproductionandstorageandclassificationofhigh-risebuildings,basicrequirementsforfireresistanceclassofindustrialandcivilbuildingssuchasfactorybuildings,storages,residentialbuildingsandpublicbuildingsandbasicrequirementsforfireresistancerating,planearrangement,firecompartment,fireseparation,buildingfireprotectionconstruction,fireseparationdistanceandfire-fightingfacilitiesarrangementofthebuildingelements,basicmeasuresandrequirementsforexplosionprotectionofindustrialbuildings;basicrequirementsforevacuationdistance,evacuationwidth,evacuationstairslayouttype,emergencylightingandevacuationindicatingsigns,andsafetyexitandevacuationdoorlayoutofindustrialandcivilbuildings;basicrequirementsforthefireseparationdistance,groupedlayoutandstoragevolumeofClassA,B,Cliquidandgastanks(tankfarm)andstackyardforcombustibles;basicrequirementsforfireprotectiondesignoftimberbuildingandcityroadtunnelengineering;basicrequirementsoffieldforfirefighting,firelane,fireelevatorandotherfacilitiessettomeetthefirefightingandrescuerequirements;fireprotectionrequirementsinsuchaspectsasheating,ventilatingandairconditioningandelectricityofbuildingsaswellasbasicrequirementsforpowersupply,distributionlineandthelikeoffire-fightingelectricequipment.Therehavebeensomesignificantchangesinthiscodeover"CodeofDesignonBuildingFireProtectionandPrevention"(GB50016-2006)and"CodeforFireProtectionDesignofTallBuilding"(GB50045-95)(2005edition)asfollows:1\n1."CodeofDesignonBuildingFireProtectionandPrevention"and"CodeforFireProtectionDesignofTallBuilding"wereincorporated,withtheirinconsistentrequirementsadjusted.Theresidentialbuildingswereclassifieduniformlybytheirbuildingheight.2.Twochapters("FireFightingandRescueFacilities"and"TimberBuildings")wereadded,improvingtherelevantrequirementsoffire-fightingandrescueandstandardizingthefireprotectionrequirementsoftimberbuildings.3.Thefireprotectionrequirementsofthermalinsulationsystemforbuildingsweresupplemented.4.Specificrequirementsweremadeforthearrangementoffire-fightingfacilitiesandtherelevantcontentswereperfected;therequirementsforthedesignoffirewatersupplysystem,indoorandoutdoorfirehydrantsystemsandsmokecontrolandsmokeexhaustsystemwerespecifiedincorrespondingnationalstandardsrespectively.5.Thefireprotectionrequirementsofhigh-riseresidentialbuildingsandthehigh-risecivilbuildingswithbuildingheightlargerthan100mwereproperlyimproved.6.Thefireprotectionrequirementsofroofedcommercialpedestrianstreetwhenitisusedforthesafeevacuationofthebuildingsonbothsidesofitweresupplemented;thedesignevacuationpeopledensityofbusinesshallandexhibitionhallofbuildingmaterials,furnitureandlightfixturestoreswereadjustedandsupplemented.7.Thefireprotectionrequirementsforundergroundstorages,logisticsbuildings,largecombustiblegastanks(tankfarm),liquidammoniatanksandLNGtanksweresupplemented,andthefireseparationdistanceofliquidoxygentanksandthelikewereadjusted.8.Therelevantrequirementsforpreventingverticalorhorizontalfirespreadinbuildingswereimproved.Provisionsprintedinboldtypeinthiscodearemandatoryonesandmustbeimplementedstrictly.TheMinistryofHousingandUrban-RuralDevelopmentofthePeople'sRepublicofChinaisinchargeoftheadministrationofthiscodeandtheexplanationofcompulsoryprovisions;theMinistryofPublicSecurityofthePeople'sRepublicofChinaisresponsiblefortheroutinemanagement;authorizedbyFireDepartmentofMPS,TianjinFireResearchInstituteandSichuanFireResearchInstituteareresponsiblefortheexplanationofspecifictechnicalcontents.Whereasthiscodeisacomprehensivefireprotectiontechnicalstandardwithstrongpolicyandtechnologyorientationsandwidecoverage,allrelevantorganizationsarekindlyrequestedtosumupandaccumulateyourexperienceinengineeringpracticeandscientificresearchduringtheprocessofimplementingthiscode,andrelevantcomments,recommendationsandproblems,whenevernecessary,canbepostedorpassedontotheFireDepartmentofMPS(address:No.70Guang'anmenSouthStreet,XichengDistrict,Beijing,100054,China)forreferenceinthefuturerevisionandforinterpretationbyTianjinandSichuanFireResearchInstitutesofMPS.Chiefdevelopmentorganizations,co-developmentorganizations,chiefdraftersandchiefexaminersofthiscode:ChiefDevelopmentOrganizations:TianjinFireResearchInstituteoftheMinistryofPublicSecuritySichuanFireResearchInstituteoftheMinistryofPublicSecurity2\nCo-developmentOrganizations:ChinaAcademyofBuildingResearchChinaNortheastArchitectureDesignandResearchInstituteCo.,Ltd.ChinaIPPRInternationalEngineeringCo.,Ltd.NorthChinaMunicipalEngineeringDesign&ResearchInstituteChinaLightIndustryInternationalEngineeringCo.,Ltd.ChinaHuanqiuContracting&EngineeringCorporationChinaArchitectureDesignandResearchGroupShenyangFireResearchInstituteoftheMinistryofPublicSecurityBeijingInstituteofArchitecturalDesignTianjinArchitectureDesignInstituteArchitecturalDesignandResearchInstituteofTsinghuaUniversityCo.,Ltd.NortheastElectricPowerDesignInstituteEastChinaArchitecturalDesign&ResearchInstituteCo.,Ltd.ShanghaiTunnelEngineering&RailTransitDesignandResearchInstituteBeijingPublicSecurityFireCorpsShanghaiPublicSecurityFireCorpsTianjinPublicSecurityFireCorpsSichuanPublicSecurityFireCorpsShaanxiPublicSecurityFireCorpsLiaoningPublicSecurityFireCorpsFujianPublicSecurityFireCorpsChiefDrafters:DuLanping,MaHeng,NiZhaopeng,LuGuojian,ShenWen,WangZongcun,HuangDexiang,QiuPeifang,ZhangLei,WangJiong,DuXia,WangJinyuan,GaoJianmin,ZhengJinli,ZhouXiang,SongXiaoyong,ZhaoKewei,ChaoHaiou,LiYinqing,ZengJie,LiuZuling,GuoShulin,DingHongjun,ShenYoudi,ChenYunyu,XieShujun,ZhengShi,LiuJianhua,HuangXiaojia,LiXiangdong,ZhangFengxin,SongXiaochun,DouJiuguiandZhengTieyi.ChiefExaminers:FangRuqing,ZhangYaoze,ZhaoLi,LiuYuehong,ZhangShuping,ZhangFulin,HeRenfei,JinHongxiang,WangQingsheng,WuHua,PanYiping,SuDan,XiaWeiping,JiangGang,DangJie,GuoJing,FanLong,YangXiwei,HuXiaoyuan,ZhuDongqing,LongWeiguoandHuangXiaokun.3\nContents1GeneralProvisions................................................................................................................12TerminologiesandSymbols..................................................................................................22.1Terminologies.............................................................................................................22.2Symbols......................................................................................................................33FactoryBuildingsandStorages............................................................................................53.1ClassificationofFireHazards....................................................................................53.2FireResistanceClassofFactoryBuildingsandStorages..........................................73.3Storeys,OccupiedAreaandPlaneArrangementofFactoryBuildingsandStorages93.4FireSeparationDistanceofFactoryBuildings........................................................163.5FireSeparationDistanceofStorages.......................................................................203.6ExplosionPreventionofFactoryBuildingsandStorages........................................233.7SafeEvacuationofFactoryBuildings......................................................................253.8SafeEvacuationofStorages.....................................................................................274ClassA,B,CLiquidandGasTanks(TankFarm)andStackyardforCombustibles.........284.1GeneralRequirements..............................................................................................284.2FireSeparationDistanceofClassA,B,CLiquidTanks(TankFarm)....................284.3FireSeparationDistanceofCombustibleandCombustion-supportingGasTanks(TankFarm).......................................................................................................................324.4FireSeparationDistanceofLPGTanks(TankFarm)..............................................364.5FireSeparationDistanceofStackyardforCombustibles........................................385CivilBuildings....................................................................................................................405.1ClassificationandFireResistanceClass..................................................................405.2GeneralLayout.........................................................................................................425.3FireCompartmentandStoreys.................................................................................445.4PlaneArrangement...................................................................................................485.5SafeEvacuationandRefuge....................................................................................536BuildingConstruction.........................................................................................................646.1FireWall...................................................................................................................646.2BuildingElementsandPipeShafts..........................................................................656.3Roof,BlindCeilingandJoints.................................................................................676.4EvacuationStaircasesandStairs..............................................................................686.5FireDoor,WindowandFireRollerShutter.............................................................726.6Overpass,TrestleandPipeTrench...........................................................................736.7BuildingInsulationandExteriorWallFinishSystem..............................................737FireFightingandRescueFacilities....................................................................................767.1FireLane..................................................................................................................767.2FieldforFireFighting..............................................................................................777.3FireElevator.............................................................................................................787.4HelicopterLandingPad............................................................................................798ArrangementofFire-fightingFacilities..............................................................................808.1GeneralRequirements..............................................................................................801\n8.2IndoorFireHydrantSystem.....................................................................................818.3AutomaticFireExtinguishingSystem.....................................................................828.4FireAlarmSystem...................................................................................................868.5SmokeControlandSmokeExhaustSystem............................................................879Heating,VentilatingandAirConditioning.........................................................................899.1GeneralRequirements..............................................................................................899.2Heating.....................................................................................................................899.3VentilatingandAirConditioning.............................................................................9010ElectricSystem.................................................................................................................9310.1FirePowerSupplyandDistribution.......................................................................9310.2PowerLineandElectricEquipment......................................................................9410.3FireEmergencyLightingandEvacuationIndicatingSign....................................9611TimberBuildings..............................................................................................................9812CityRoadTunnel............................................................................................................10312.1GeneralRequirements..........................................................................................10312.2FireWaterSupplyandFireExtinguishingEquipment........................................10412.3VentilatingandSmokeExhaustSystem...............................................................10612.4FireAlarmSystem...............................................................................................10612.5PowerSupplyandOtherRequirements...............................................................107AppendixACalculationMethodofBuildingHeightandStoreys......................................108AppendixBCalculationMethodofFireSeparationDistance............................................109AppendixCTemperature-riseCurveforFireResistanceRatingTestandPerformanceCriteriaofLoad-bearingStructureinTunnel..........................................................................110ExplanationofWordinginThisCode.....................................................................................111ListofQuotedStandards........................................................................................................1122\n1GeneralProvisions1.0.1Thiscodeisformulatedwithaviewtopreventingfireaccidentsinbuildings,reducingfirehazardsandprotectingpersonalandpropertysafety.1.0.2Thiscodeisapplicabletothefollowingconstructed,renovatedandextendedbuildings:1Factorybuildings;2Storages;3Civilbuildings;4ClassA,B,Cliquidtanks(tankfarm);5Combustibleandcombustion-supportinggastanks(tankfarm);6Stackyardforcombustibles;7Cityroadtunnels.Ifspecialnationalstandardsareavailable,thefireprotectiondesignofbuildingsforcivilairdefenseengineering,petroleumandnaturalgasengineering,petrochemicalengineering,thermalpowerplantsandsubstationsshouldcomplywithsuchstandards.1.0.3Thiscodeisnotapplicabletothefireprotectiondesignofbuildingssuchasfactorybuildings(storages)forgunpowder,explosiveandtheirproductsaswellasfireworksandfirecrackers.1.0.4Whereoccupanciesfordifferentpurposesarearrangedinthesamebuilding,fireseparationshallbeprovidedbetweenthem.Thefireprotectiondesignforthisbuildingandtheirfunctionaloccupanciesshallbedeterminedaccordingtotherelevantrequirementsofthiscode.1.0.5Thefireprotectiondesignofbuildingsshallcomplywiththerelevantnationalprinciplesandpolicies,andguarantee,onthewhole,safetyandusability,advancedtechnologyaswellaseconomyandrationalityaccordingtothecharacteristicsofbuildingsandfirehazardsinthem.1.0.6Inadditiontomeetingtherequirementsofthiscode,thebuildingswithheightlargerthan250mshallalsobetakenwithstricterfirepreventionmeasuresaccordingtotheactualconditions.Theirfireprotectiondesignshallbesubmittedtothenationalfireauthoritiesforsubjectstudyanddemonstration.1.0.7Inadditiontotherequirementsofthiscode,thefireprotectiondesignofbuildingsshallalsocomplywiththosespecifiedinthecurrentrelevantstandardsofthenation.1\n2TerminologiesandSymbols2.1Terminologies2.1.1High-risebuildingTheresidentialbuildingswithheightlargerthan27mandthenon-single-storeyfactorybuildings,storagesandothercivilbuildingswithheightlargerthan24m.Note:ThecalculationofbuildingheightshallmeetthosespecifiedinAppendixAofthiscode.2.1.2PodiumTheancillarybuildingwithheightnotlargerthan24m,whichisbeyondtheprojectionofthemainbodyofhigh-risebuildingbutisconnectedwiththemainbody.2.1.3ImportantpublicbuildingThepublicbuildingwhichmaycauseheavycasualties,propertylossandseveresocialimpactincaseoffire.2.1.4CommercialfacilitiesSmallbusinesshousessuchasstores,postoffices,savingsbanks,barbershopslocatedonthefirstfloororonthefirstfloorandsecondfloorofresidentialbuildings,withthebuildingareaofeachseparatedunitnotlargerthan300m2.2.1.5HighrackstorageMechanicalorautomaticrackstorage,withrackheightlargerthan7m.2.1.6Semi-basementAfloorofabuilding,withtheaverageheightoftheroomgroundbelowtheoutdoordesigngroundfor1/3~1/2oftheaverageclearheightofsuchroom.2.1.7BasementAfloorofabuilding,withtheaverageheightoftheroomgroundbelowtheoutdoordesigngroundgreaterthan1/2oftheaverageclearheightofsuchroom.2.1.8OpenflamelocationAfixedlocation,indoororoutdoor,withexposedflameorredhotsurface,excludingcookingappliance,inductioncookerandthelikeinacivilbuilding.2.1.9SparkingsiteAfixedlocationlikechimneywithspottingfire,orforsuchoperationsasoutdoorgrindingwheel,electricwelding,gasweldingandgascutting.2.1.10FireresistanceratingAperiodstartingfromthetimethattheelements,accessoriesorstructuresofabuildingareexposedtofire,understandardfireresistanceconditions,tothetimethattheylosebearingcapacity,integrityorinsulation,expressedinhours.2.1.11FirepartitionwallNon-combustiblewallinabuilding,withfireresistanceratingnotinferiortorelevantrequirements,forpreventingfirefromspreadingtoadjacentareas.2.1.12FirewallNon-combustiblewallinabuilding,withfireresistanceratingnotlessthan3.00h,forpreventingfirefromspreadingtoadjacentbuildingsoradjacenthorizontalfirecompartments.2.1.13Refugefloor(room)2\nAfloor(room)inabuilding,fortemporarilyprotectingpeoplefromfireanditssmokeincaseoffire.2.1.14SafetyexitExitandentranceofstaircaseandexternalstairforsafeevacuationofpeopleorexitdirectlyleadingtointernalandexternalsafeareas.2.1.15EnclosedstaircaseStaircasesetwithadooratitsentrance,forpreventingfiresmokeandheatfromenteringintoit.2.1.16Smoke-proofstaircaseStaircasesetwithsuchfacilitiesassmoke-prooffrontroom,openbalconyorconcavecorridor(collectivelycalledas"frontroom")atitsentranceandwithallthedoorsleadingtothefrontroomandstaircaseoffiredoors,forpreventingfiresmokeandheatfromenteringintoit.2.1.17ExitpassagewayPassagewaywhichistakenwithsmoke-proofmeasuresandisalsosetwithfirepartitionwallswithfireresistanceratingnotlessthan3.00honbothsidesforpeopletogotooutsidesafely.2.1.18FlashpointThelowesttemperature(determinedbyclosedcupmethod)ofcombustibleliquidorsolidwherethemixtureofvaporontheirsurfaceandaircanflashoveroncemeetingignitionsourceunderspecifiedtestconditions.2.1.19LowerexplosionlimitTheminimumconcentrationwherethemixtureofcombustiblevapor,gasordustwithaircanexplodeoncemeetingignitionsource.2.1.20Boil-overoilWater-containedoilproductswhichcanproduceheatwaveduringcombustion.2.1.21FireseparationdistanceAspacingdistanceforpreventingaburningbuildingfromignitingitsadjacentbuildingswithincertaintimeandfacilitatingfirecontrol.Note:ThecalculationmethodforfireseparationdistanceshallmeetthosespecifiedinAppendixBofthiscode.2.1.22FirecompartmentPartialspaceinabuilding,separatedbyfirewall,floorslabandotherfireseparationfacilitiesandcapableofpreventingfirefromspreadingtotherestpartsofthebuildingwithincertaintime.2.1.23FullwaterspoutAjetlengthfromhosenozzletoapositionwherewaterspoutequalto90%ofthejetflowpassesthrougharoundholeindiameterof380mm.2.2SymbolsA-thepressurereliefareaC-thepressurereliefratioD-thediameterofstoragetankDN-thenominaldiameterofpipe3\nΔH-theheightdifferenceofbuildingsL-theenclosedlengthoftunnelN-thenumberofpeoplen-thenumberofseatsK-thecharacteristicindexofexplosionV-thevolumeofbuildingandstackyardorthevolumeorcapacityoftankandbottlegroupW-thecapacityofstackyardforcombustiblesorgrainsilo,binandbarn4\n3FactoryBuildingsandStorages3.1ClassificationofFireHazards3.1.1Firehazardsofproductionshallbeclassifiedaccordingtosuchfactorsasthepropertiesandquantityofsubstancesusedorgeneratedduringproduction,maybeclassifiedintoCategoriesA,B,C,DandE,andshallbeinaccordancewiththosespecifiedinTable3.1.1.Table3.1.1ClassificationofFireHazardsofProductionFirehazardcategoryFirehazardcharacteristicsofproductionusingorgeneratingthefollowingsubstancesofproduction1.Liquidwithflashpointlessthan28℃;2.Gaswithlowerexplosionlimitlessthan10%;3.Substancesbeingcapableofspontaneousdecompositionatnormaltemperatureorbeingcapableofrapidspontaneousignitionorexplosionaftergettingoxidizedintheair;4.Substancesbeingcapableofgeneratingcombustiblegasandcausingcombustionorexplosionatnormaltemperatureundertheactionofwaterorthewatervaporintheair;A5.Strongoxidizerwhichisapttocausecombustionorexplosionincaseofacid,heat,impact,friction,catalysisaswellassuchflammableinorganicsubstancesasorganicsubstanceorsulfur;6.Substanceswhichcancausecombustionorexplosionincaseofimpact,frictionorbeingexposedtooxidizerandorganicsubstances;7.Productionwheretheoperatingtemperatureinsidetheenclosedequipmentisnotlessthanthespontaneousignitiontemperatureofthesubstance1.Liquidwithflashpointnotlessthan28℃butlessthan60℃;2.Gaswithlowerexplosionlimitnotlessthan10%;3.OxidizernotbelongingtoCategoryA;B4.FlammablesolidnotbelongingtoCategoryA;5.Combustion-supportinggas;6.Floatingdustandfiberwhichcanformexplosivemixturetogetherwithair,andliquidfogdropwithflashpointnotlessthan60℃1.Liquidwithflashpointnotlessthan60℃;C2.Combustiblesolid1.Productionwherenon-combustiblesubstanceisprocessed,withstrongradiantheat,sparkorflamefrequentlygeneratedathightemperatureormoltenstate;D2.Variousproductionwheregas,liquidandsolidareusedasfuelorgasandliquidarecombustedforotherpurpose;3.Productionwhereorprocessingdifficult-combustiblesubstanceisusedatnormaltemperatureEProductionwhereorprocessingnon-combustiblesubstanceisusedatnormaltemperature3.1.2Whenproductionwithdifferentfirehazardsiscarriedoutinafactorybuildingorinanyfirecompartmentofthefactorybuilding,thefirehazardcategoryofproductioninfactorybuildingorinfirecompartmentshallbedeterminedaccordingtothepartwithhigherfirehazard;whenthequantityofflammablesorcombustiblesusedorgeneratedduringproductionprocessissmallandisinsufficienttoconstituteexplosionorfirehazard,thefirehazard5\ncategorymaybedeterminedaccordingtotheactualconditions;whenoneofthefollowingconditionsismet,thefirehazardcategorymaybedeterminedaccordingtothepartwithlowerfirehazard:1Theproductionpartwithhigherfirehazardaccountsforlessthan5%ofthebuildingareaofthisfloororthisfirecompartmentorthepaintingsectioninCategoriesDandEfactorybuildingsaccountsforlessthan10%,andfirecannotspreadtootherpartsduringfireaccidentortheproductionpartwithhigherfirehazardhasbeentakenwitheffectivefirepreventionmeasures;2ThepaintingsectioninCategoriesDandEfactorybuildingsisadoptedwithenclosedpaintsprayingprocess,negativepressureiskeptinsidetheenclosedpaintsprayingspace,thepaintingsectionissetwithcombustiblegasdetectionandalarmsystemorautomaticexplosionsuppressionsystem,andthepaintingsectionaccountsfornomorethan20%ofthebuildingareaofthelocalfirecompartment.3.1.3Thefirehazardofstoredarticlesshallbeclassifiedaccordingtosuchfactorsasthepropertiesofstoredarticlesandthequantityofcombustiblesinstoredarticles,maybeclassifiedintoCategoriesA,B,C,DandE,andshallbeinaccordancewiththosespecifiedinTable3.1.3.Table3.1.3ClassificationofFireHazardsofStoredArticlesFirehazardcategoryFirehazardcharacteristicsofstoredarticlesofstoredarticles1.Liquidwithflashpointlessthan28℃;2.Gaswithlowerexplosionlimitlessthan10%,andsolidsubstancewhichcangenerategaswithlowerexplosionlimitlessthan10%undertheactionofwaterorthewatervaporintheair;3.Substancebeingcapableofspontaneousdecompositionatnormaltemperatureorbeingcapableofrapidspontaneousignitionorexplosionaftergettingoxidizedintheair;A4.Substancebeingcapableofgeneratingcombustiblegasandcausingcombustionorexplosionatnormaltemperatureundertheactionofwaterorthewatervaporintheair;5.Strongoxidizerwhichisapttocausecombustionorexplosionincaseofacid,heat,impactandfrictionaswellassuchflammableinorganicsubstancesasorganicsubstanceorsulfur;6.Substancewhichcancausecombustionorexplosionwhenincaseofimpact,frictionorbeingexposedtooxidizerandorganicsubstance1.Liquidwithflashpointnotlessthan28℃butlessthan60℃;2.Gaswithlowerexplosionlimitnotlessthan10%;3.OxidizernotbelongingtoCategoryA;B4.FlammablesolidnotbelongingtoCategoryA;5.Combustion-supportinggas;6.Articleswhichcangetoxidizedslowlyatnormaltemperatureifbeingexposedtoairandcausespontaneousignitionduetoaccumulatedheat1.Liquidwithflashpointnotlessthan60℃;C2.CombustiblesolidDDifficult-combustiblearticlesENon-combustiblearticles3.1.4Whenarticlesofdifferentfirehazardsarestoredinastorageorinanyfirecompartmentofstorage,thefirehazardofthisstorageorfirecompartmentshallbe6\ndeterminedaccordingtothearticleswiththehighestfirehazard.3.1.5AsforthestoragesofCategoriesDandEarticles,iftheweightofcombustiblepackageislargerthan1/4ofthatofthearticlesorthevolumeofcombustiblepackageislargerthan1/2ofthatofthearticles,thefirehazardshallbedeterminedasCategoryC.3.2FireResistanceClassofFactoryBuildingsandStorages3.2.1ThefireresistanceclassoffactorybuildingsandstoragesmaybeclassifiedintoClassesI,II,IIIandIV,andthecombustionperformanceandfireresistanceratingofcorrespondingbuildingelementsshallnotbeinferiortothosespecifiedinTable3.2.1unlessotherwisestatedinthiscode.Table3.2.1CombustionPerformanceandFireResistanceRating(h)ofFactoryBuildingandStorageBuildingElementsofDifferentFireResistanceClassesFireresistanceclassElementnameClassIClassIIClassIIIClassIVNon-combustibleNon-combustibleNon-combustibleNon-combustibleFirewall3.003.003.003.00Non-combustibleNon-combustibleNon-combustibleDifficult-combustibleLoadbearingwall3.002.502.000.50WallsofstaircaseandfrontroomNon-combustibleNon-combustibleNon-combustibleDifficult-combustibleWallWallsofelevatorshaft2.002.001.500.50PartitionwallsonbothsidesofNon-combustibleNon-combustibleNon-combustibleDifficult-combustibleevacuationpassageway1.001.000.500.25Non-load-bearingexteriorwallNon-combustibleNon-combustibleDifficult-combustibleDifficult-combustiblePartitionwallbetweenrooms0.750.500.500.25Non-combustibleNon-combustibleNon-combustibleDifficult-combustibleColumn3.002.502.000.50Non-combustibleNon-combustibleNon-combustibleDifficult-combustibleBeam2.001.501.000.50Non-combustibleNon-combustibleNon-combustibleDifficult-combustibleFloorslab1.501.000.750.50Non-combustibleNon-combustibleDifficult-combustibleRoofload-bearingelementsCombustible1.501.000.50Non-combustibleNon-combustibleNon-combustibleEvacuationstairsCombustible1.501.000.75Non-combustibleDifficult-combustibleDifficult-combustibleSuspendedceiling(includingceilingjoist)Combustible0.250.250.15Note:Asforthesuspendedceilingmadeofnon-combustiblematerialsinbuildingswithClassIIfireresistance,itsfireresistanceratingisnotlimited.3.2.2Thefireresistanceclassofhigh-risefactorybuildingsandCategoriesAandBfactorybuildingsshallnotbelessthanClassII,andthatofindependentCategoriesAandBsingle-storeyfactorybuildingswithbuildingareanotgreaterthan300m2mayadoptClassIII.3.2.3Thefireresistanceclassofsingle-/multi-storeyCategoryCfactorybuildingsand7\nmulti-storeyCategoriesDandEfactorybuildingsshallnotbelessthanClassIII.AsforthefactorybuildingsusingorgeneratingClassCliquidsandtheCategoryDfactorybuildingswithspark,redhotsurfaceandopenflame,thefireresistanceclassshallnotbelessthanClassII.Asforsingle-storeyCategoryCfactorybuildingswithbuildingareanotgreaterthan500m2andsingle-storeyCategoryDfactorybuildingswithbuildingareanotgreaterthan1,000m2,thefireresistanceclassmayadoptClassIII.3.2.4Asforthebuildingsusingorstoringparticularlyvaluableequipmentorarticlessuchasmachinery,instrumentsandapparatuses,thefireresistanceclassshallnotbelessthanClassII.3.2.5ThefireresistanceclassofboilerhouseshallnotbelessthanClassII.Incaseofcoal-firedboilerhousewithtotalevaporationnotlargerthan4t/h,itsfireresistanceclassmayadoptClassIII.3.2.6Thefireresistanceclassofoilimmersedtransformerroomandhigh-voltagedistributiondeviceroomshallnotbelessthanClassII,andotherfireprotectiondesignshallmeettherequirementsofcurrentnationalstandard"CodeforDesignofFireProtectionforFossilFuelPowerPlantsandSubstations"(GB50229)andotherrelevantstandards.3.2.7Thefireresistanceclassofhighrackstorages,high-risestorages,CategoryAstorages,multi-storeyCategoryBstoragesandmulti-storeyCategoryCstoragesstoringcombustibleliquidshallnotbelessthanClassII.Thefireresistanceclassofsingle-storeyCategoryBstorages,single-storeyCategoryCstorages,multi-storeyCategoryCstoragesstoringcombustiblesolidsandmulti-storeyCategoriesDandEstoragesshallnotbelessthanClassIII.3.2.8ThefireresistanceclassofgrainsilosshallnotbelessthanClassII;thegrainsilowithClassIIfireresistancemayadoptsteelsilo.ThefireresistanceclassofgrainstorehousesshallnotbelessthanClassIII;thebulkgrainstorehouseswithClassIIfireresistancemaybeadoptedwithmetalload-bearingelementswithoutfireprotection.3.2.9ThefireresistanceratingoffirewallsinCategoriesAandBfactorybuildingsandCategoriesA,BandCstoragesshallnotbelessthan4.00h.3.2.10Thefireresistanceratingofcolumnsinsingle-storeyfactorybuildings(storages)withClassIorIIfireresistanceshallnotbelessthan2.50hand2.00hrespectively.3.2.11AsfortheClassIfireresistancesingle-/multi-storeyfactorybuildings(storages)withfullprotectionofsprinklersystem,thefireresistanceratingoftheirroofload-bearingelementsshallnotbelessthan1.00h.3.2.12ExceptCategoriesAandBstoragesandhigh-risestorages,ifthenon-load-bearingexteriorwallsofbuildingswithClassIorIIfireresistanceadoptnon-combustiblewallbody,theirfireresistanceratingshallnotbelessthan0.25h;iftheyadoptdifficult-combustiblewallbody,theirfireresistanceratingshallnotbelessthan0.50h.Asforthe4-storeyorlessCategoriesDandEovergroundfactorybuildings(storages)withClassIorIIfireresistance,iftheirnon-load-bearingexteriorwallsadoptnon-combustiblewallbody,theirfireresistanceratingisnotlimited.3.2.13Asforfactorybuildings(storages)withClassIIfireresistance,ifthepartitionwallbetweenroomsinthemadoptdifficult-combustiblewallbody,thefireresistanceratingshall8\nbeincreasedby0.25h.3.2.14Asfortheprestressedreinforcedconcretefloorslabsinmulti-storeyfactorybuildingswithClassIIfireresistance,thefireresistanceratingshallnotbelowerthan0.75h.3.2.15Asfortheaccessibleflatroofoffactorybuildings(storages)withClassIorIIfireresistance,thefireresistanceratingoftheroofslabshallnotbelessthan1.50hand1.00hrespectively.3.2.16Theroofslaboffactorybuildings(storages)withClassIorIIfireresistanceshallbemadeofnon-combustiblematerials.Theroofwaterprooflayershouldadoptnon-combustibleordifficult-combustiblematerials.Ifcombustiblewaterproofmaterialsareadoptedandlaidovercombustibleordifficult-combustiblethermalinsulationmaterials,thewaterproofmaterialsorthecombustible/difficult-combustiblethermalinsulationmaterialsshallbeprotectedwithnon-combustiblematerials.3.2.17Ifitisnecessarytoadoptmetalsandwichpanelsasthenon-load-bearingexteriorwall,partitionwallsbetweenroomsandroofslabinbuildings,thecorematerialshallbenon-combustibleanditsfireresistanceratingshallmeettherelevantrequirementsofthiscode.3.2.18Unlessotherwisestatedinthiscode,thefireresistanceclassofsuchfactorybuildings(storages)withload-bearingwoodencolumnsandwithwallsmadeofnon-combustiblematerialsmaybedeterminedasClassIV.3.2.19Properfireprotectionmeasuresshallbetakenattheexposedjointpositionsofprecastreinforcedconcreteelements,andthefireresistanceratingofjointsshallnotbelessthanthatofcorrespondingelements.3.3Storeys,OccupiedAreaandPlaneArrangementofFactoryBuildingsandStorages3.3.1Unlessotherwisestatedinthiscode,thenumberofstoreysoffactorybuildingsandthemaximumpermissiblebuildingareaofeachfirecompartmentshallbeinaccordancewiththosespecifiedinTable3.3.1.9\nTable3.3.1NumberofStoreysofFactoryBuildingsandMaximumPermissibleBuildingAreaofEachFireCompartmentMaximumpermissiblebuildingareaofeachfirecompartment(m2)UndergroundorFirehazardFireresistanceMaximumMulti-storeyHigh-risesemi-undergroundcategoryofclassoffactorypermissiblenumberSingle-storeyfactoryfactoryfactorybuildingproductionbuildingofstoreysfactorybuildingbuildingbuilding(includingbasementandsemi-basement)ClassISinglestoreyshould4,0003,000--AClassIIbeadopted3,0002,000--ClassINotlimited5,0004,0002,000-BClassII64,0003,0001,500-ClassINotlimitedNotlimited6,0003,000500CClassIINotlimited8,0004,0002,000500ClassIII23,0002,000--ClassesIandIINotlimitedNotlimitedNotlimited4,0001,000DClassIII34,0002,000--ClassIV11,000---ClassesIandIINotlimitedNotlimitedNotlimited6,0001,000EClassIII35,0003,000--ClassIV11,500---Notes:1Thefirecompartmentsshallbeseparatedbyfirewalls.AsforthefactorybuildingswithClassIorIIfireresistanceotherthanCategoryAfactorybuildings,ifthebuildingareaoftheirfirecompartmentislargerthanthevaluesstatedinthistableanditisindeeddifficulttobuildfirewall,firerollershutterorwatercurtainforfirecompartmentmaybeadoptedinstead.Iffirerollershutterisadopted,itshallmeettherequirementsof6.5.3inthiscode;ifwatercurtainforfirecompartmentisadopted,itshallmeettherequirementsofthecurrentnationalstandard"CodeofDesignforSprinklerSystems"(GB50084).2Asforthemulti-storeytextilefactorybuildingswithClassIfireresistanceandsingle-/multi-storeytextilefactorybuildingswithClassIIfireresistanceotherthanthebastfiberfactorybuildings,themaximumpermissiblebuildingareaofeachfirecompartmentmaybeincreasedby0.5timesaccordingtothosespecifiedinthistable,buttherawcottonunpackingandblowingroomsshallbeseparatedfromotherpartsinthefactorybuildingswithfirepartitionwallswithfireresistanceratingnotlessthan2.50h;ifitisrequiredtosetdoors,windowsoropenings,ClassAfiredoorsandwindowsshallbeinstalled.3Asforthesingle-/multi-storeycombinedpaperfactorybuildingswithClassIorIIfireresistance,themaximumpermissiblebuildingareaofeachfirecompartmentmaybeincreasedby1.5timesaccordingtothosespecifiedinthistable.AsforthecombinedwetpaperfactorybuildingswithClassIorIIfireresistance,ifautomaticfireextinguishingsystemissetinthedryerhoodofpapermachineandeffectivefireextinguishingfacilitiesaresetatthefinishedsectionforthepurposeoffireprotection,themaximumpermissiblebuildingareaofeachfirecompartmentmaybedeterminedaccordingtotheprocessrequirements.4AsfortheoperationtowerofcerealsilowithClassIorIIfireresistance,ifthenumberofworkerateachstoreydoesnotexceed2,thenumberofstoreysisnotlimited.5TheproductionroomsincombinedcigaretfactorybuildingswithClassIorIIfireresistance,likeroomsforrawmaterial,stock,groupingformulation,silkreeling,silkstoringandrollingpackage,auxiliarymaterialturnover,10\ntemporarystorageoffinishedproducts,andtobaccoshredexpansionbycarbondioxide,shallbedividedintoindependentfireseparationunits,andmaybeseparatedbyfirewallswhentheprocessconditionspermit.Thereinto,thesilkreeling,silkstoringandrollingpackageroomsmaydividedintoonefirecompartmentandthemaximumpermissiblebuildingareaofeachfirecompartmentmaybedeterminedaccordingtotheprocessrequirements,butthesilkreeling,silkstoringandrollingpackageroomsshallbeseparatedbyfirepartitionwallsandfloorslabswithfireresistanceratingnotlessthan2.00hand1.00hrespectively.Inaddition,propermeasuresshallbetakenattheopeningsbetweenhorizontalandverticalfireseparationsinthefactorybuildingstopreventfirespreading.6Asfortheoperationplatformandrepairplatforminfactorybuildings,ifthenumberoftheirusersislessthan10,theplatformareamaynotbecountedintothebuildingareaoflocalfirecompartment.7"-"means“notallowed”.3.3.2Unlessotherwisestatedinthiscode,thenumberofstoreysofstoragesandtheirareashallbeinaccordancewiththosespecifiedinTable3.3.2.11\nTable3.3.2NumberofStoreysofStoragesandTheirAreaMaximumpermissibleoccupiedareaofeachstorageandmaximumpermissiblebuildingareaofeachfirecompartment(m2)UndergroundorFirehazardcategoryFireresistanceMaximumpermissiblesemi-undergroundstorageSingle-storeystorageMulti-storeystorageHigh-risestorageofstoredarticlesclassofstoragesnumberofstoreys(includingbasementandsemi-basement)EachstorageFirecompartmentEachstorageFirecompartmentEachstorageFirecompartmentFirecompartmentItems3and4ClassI118060-----AItems1,2,5and6ClassesIandII1750250-----ClassIandClass32,000500900300---Items1,3and4II1500250-----BClassIIIClassesIandII52,8007001,500500---Items2,5and6ClassIII1900300-----ClassesIandII54,0001,0002,800700--150Item1ClassIII11,200400-----CClassesIandIINotlimited6,0001,5004,8001,2001,000300Item24,000ClassIII32,1007001,200400--ClassesIandIINotlimitedNotlimited3,0001,5004,8001,200500NotlimitedDClassIII33,0001,000500---1,500ClassIV12,100700----ClassesIandIINotlimitedNotlimitedNotlimited2,0006,0001,5001,000NotlimitedEClassIII33,0001,000700---2,100ClassIV12,100700----Notes:1Thefirecompartmentsinthestoragesmustbeseparatedbyfirewalls.ThefirewallsbetweenthefirecompartmentsinCategoriesAandBstoragesshallnotbearrangedwithdoor,12\nwindoworopening.Themaximumpermissibleoccupiedareaofundergroundorsemi-undergroundstorages(includingbasementandsemi-basement)shallnotbegreaterthanthatoftheovergroundstoragesofcorrespondingcategory.2Thebarreloilstoragesinoildepotshallmeettherequirementsofthecurrentnationalstandard"CodeforDesignofOilDepot"(GB50074).3AsforcoalhomogenizingstorageswithClassIorIIfireresistance,themaximumpermissiblebuildingareaofeachfirecompartmentshallnotbegreaterthan12,000m2.4Asfortheindependentlybuiltammoniumnitratestorages,calciumcarbidestorages,thestoragesofmoleculeproductssuchaspolyethylene,ureastorages,blendedcoalstorages,independentfinishedproductstoragesofpapermill,whenthefireresistanceclassofthebuildingisnotinferiortoClassII,themaximumpermissibleoccupiedareaofeachstorageandthemaximumpermissiblebuildingareaofeachfirecompartmentmaybeincreasedby1.0timesaccordingtothosespecifiedinthistable.5ThemaximumpermissibleoccupiedareaofgrainstorehousewithClassIorIIfireresistanceshallnotbegreaterthan12,000m2,andthemaximumpermissiblebuildingareaofeachfirecompartmentshallnotbegreaterthan3,000m2;themaximumpermissibleoccupiedareaofgrainstorehousewithClassIIIfireresistanceshallnotbegreaterthan3,000m2,andthemaximumpermissiblebuildingareaofeachfirecompartmentshallnotbegreaterthan1,000m2.6Asforsingle-storeycottonwarehousewithClassIorIIfireresistanceandwithoccupiedareanotgreaterthan2,000m2,themaximumpermissiblebuildingareaofeachofitsfirecompartmentsshallnotbegreaterthan2,000m2.7ThemaximumpermissibleoccupiedareaofrefrigerationstoragewithClassIorIIfireresistanceandthemaximumpermissiblebuildingareaofeachofitsfirecompartmentsshallmeettherequirementsofthecurrentnationalstandard"CodeforDesignofColdStore"(GB50072).8"-"meansnotallowed.13\n3.3.3Whereautomaticfireextinguishingsystemisarrangedinthefactorybuildings,themaximumpermissiblebuildingareaofeachfirecompartmentmaybeincreasedby1.0timeaccordingtothosespecifiedin3.3.1ofthiscode.WhereautomaticfireextinguishingsystemisarrangedinCategoriesDandEovergroundfactorybuildings,themaximumpermissiblebuildingareaofeachfirecompartmentisnotlimited.Wherelocalautomaticfireextinguishingsystemsarearrangedinthefactorybuildings,theincreasedareaoftheirfirecompartmentmaybecalculatedas1.0timesofthislocalarea.Whereautomaticfireextinguishingsystemisarrangedinthestorages(exceptthefirecompartmentsintherefrigerationstorage),themaximumpermissibleoccupiedareaofeachstorageandthemaximumpermissiblebuildingareaofeachfirecompartmentmaybeincreasedby1.0timeaccordingtothosespecifiedin3.3.2ofthiscode.3.3.4CategoriesAandBproductionoccupancies(storages)shallnotbearrangedundergroundorsemi-underground.3.3.5Staffdormitorymustnotbearrangedinthefactorybuildings.OfficesandrestingroomsshallnotbearrangedinCategoriesAandBfactorybuildings;ifofficesandrestingroomsmustbeadjacenttothefactorybuildings,theyshallreachClassIIfireresistanceatleastandblastwallswithfireresistanceratingnotlessthan3.00hshallbeusedtoseparatethemfromthefactorybuildings;inaddition,independentsafetyexitsshallbearranged.WhereofficesandrestingroomsarearrangedinCategoryCfactorybuildings,firepartitionwallswithfireresistanceratingnotlessthan2.50handfloorslabwithfireresistanceratingnotlessthan1.00hshallbeusedtoseparatethemfromotherpositions;inaddition,atleast1independentsafetyexitshallbearranged.Whereitisneededtoarrangeinterconnecteddoorsonpartitionwall,ClassBfiredoorsshallbeadopted.3.3.6Whereintermediatestoragesarearrangedinthefactorybuildings,thefollowingrequirementsshallbemet:1CategoriesAandBintermediatestoragesshallbearrangedadjacenttoexternalwall,theirstoragecapacityshouldnotexceedthedemandforonedayandnight;2CategoriesA,BandCintermediatestoragesshalladoptfirewallsandnon-combustiblefloorslabswithfireresistanceratingnotlessthan1.50htoseparatethemfromotherpositions;3CategoriesDandEintermediatestoragesshalladoptfirepartitionwallswithfireresistanceratingnotlessthan2.00handfloorslabwithfireresistanceratingnotlessthan1.00htoseparatethemfromotherpositions;4Thefireresistanceclassandoccupiedareaofstoragesshallmeettherequirementsof3.3.2and3.3.3inthiscode.3.3.7TheintermediatetanksforClassCliquidinthefactorybuildingsshallbearrangedinseparateroomsandtheircapacityshallnotbegreaterthan5m3.Asforroomsarrangedwithintermediatetanks,firepartitionwallswithfireresistanceratingnotlessthan3.00handfloorslabswithfireresistanceratingnotlessthan1.50hshallbeusedtoseparatethemfromotherpositions;inaddition,ClassAfiredoorsshallbeadoptedforthoserooms.3.3.8TheoutdoorpowertransformationanddistributionstationsshallnotbearrangedinoradjacenttoCategoriesAandBfactorybuildings,andshallnotbearrangedinhazardousareasexposedtoexplosivegasordust.Asfor10kVorbelow14\nspecialoutdoorpowertransformationanddistributionstationsforCategoriesAandBfactorybuildings,theymaybeadjacenttoeachotherononesidewherefirewallwithoutdoor,windoworopeningisadopted.Moreover,theyshallmeettherequirementsofthecurrentnationalstandard"ElectricalInstallationsDesignCodeforExplosiveAtmospheresandFireHazard"(GB50058),etc.AsforpowerdistributionstationforCategoryBfactorybuildings,ClassAfirewindowshallbeadoptedwhereawindowmustbearrangedonthefirewall.3.3.9Thestaffdormitorymustnotbearrangedinthestorages.TheofficesandrestingroomsmustnotbearrangedinoradjacenttoCategoriesAandBstorages.WhereofficesandrestingroomsarearrangedinCategoriesCandDstorages,firepartitionwallwithfireresistanceratingnotlessthan2.50handfloorslabwithfireresistanceratingnotlessthan1.00hshallbeusedtoseparatethemfromotherpositions;inaddition,independentsafetyexitshallbearranged.Whereitisneededtoarrangeinterconnecteddoorsonpartitionwall,ClassBfiredoorsshallbeadopted.3.3.10Thefireprotectiondesignoflogisticsbuildingsshallmeetthefollowingrequirements:1Wherethemainfunctionsofthebuildingsareoperationssuchassortingandprocessing,thefireprotectiondesignshallbedeterminedaccordingtotherelevantrequirementsoffactorybuildingsinthiscode,whilethefireprotectiondesignofstoragesshallbedeterminedaccordingtointermediatestorages.2Wherethemainfunctionofabuildingisstorageoritisdifficulttodistinguishthemainfunctionofabuilding,thefireprotectiondesignshallbedeterminedaccordingtotherelevantrequirementsofstoragesinthiscode,however,wheretheoperatingareassuchassortingareaadoptfirewalltocompletelyseparatethemfromstorageareas,thefireprotectionrequirementsofoperatingareasandstorageareasmayberespectivelydeterminedaccordingtotherelevantrequirementsoffactorybuildingsandstoragesinthiscode.Thereinto,wheretheoperatingareassuchassortingareaadoptfirewalltocompletelyseparatethemfromstorageareas,andwhenthefollowingconditionsaremet,exceptCategoryChighrackstoragesofautomationcontrol,themaximumpermissiblebuildingareaofthefirecompartmentsofstorageareaandthemaximumpermissibleoccupiedareaofthebuildingsinstorageareamaybeincreasedby3.0timesaccordingtotherequirementsofTable3.3.2(excludingthenotes)inthiscode;1)StoringCategoryCarticlesexceptcombustibleliquid,cotton,linen,silk,woolandothertextiles,foamplasticandotherarticles,andthebuildingfireresistanceclassisnotinferiortoClassI;2)StoringCategoriesDandEarticlesandthebuildingfireresistanceclassisnotinferiortoClassII;3)Automaticwaterfireextinguishingsystemsandfirealarmsystemsarearrangedinthewholebuilding.3.3.11RailwaylineshallnotbearrangedinCategoriesAandBfactorybuildings(storages).AsfortheCategoriesC,DandEfactorybuildings(storages)withaccessofsteamlocomotiveanddiesellocomotive,non-combustiblesshallbeadoptedfortheirroofsorotherfirecontrolmeasuresshallbetaken.15\n3.4FireSeparationDistanceofFactoryBuildings3.4.1Unlessotherwisestatedinthiscode,thefireseparationdistancebetweenfactorybuildingsandbetweenfactorybuildingsandCategoriesB,C,DandEstoragesshallnotbelessthanthosespecifiedinTable3.4.1,andthefireseparationdistancewithCategoryAstorageshallmeetthosespecifiedin3.5.1thiscode.16\nTable3.4.1FireSeparationDistancebetweenFactoryBuildingsaswellasbetweenFactoryBuildingsandCategoriesB,C,DandEStoragesorCivilBuildings(m)CategoryAfactoryCategoriesC,DandEfactoryCategoryBfactorybuildings(storages)Civilbuildingsbuildingsbuildings(storages)PodiumandNameSingle-/multi-storeySingle-/multi-storeyHigh-riseSingle-/multi-storeyHigh-riseHigh-risesingle-/multi-storeyClassesIandClassesIClassClassClassesIClassesIClassClassCategoryCategoryClassesIandIIClassesIandIIClassIIIIIandIIIIIIVandIIandIIIIIIVIIICategoryASingle-/multi-storeyClassesIandII1212141312141613factorybuildingsClassesIandII12101213101214132550ClassBfactorySingle-/multi-storeyClassIII1412141512141615buildingsHigh-riseClassesIandII1313151313151713ClassesIandII12101213101214131012142015CategoryCSingle-/multi-storeyClassIII14121415121416151214162520factorybuildingsClassIV1614161714161817141618High-riseClassesIandII13131513131517131315172015ClassesIandII12101213101214131012141513CategoriesDandSingle-/multi-storeyClassIII1412141512141615121416Efactory1815ClassIV1614161714161817141618buildingsHigh-riseClassesIandII13131513131517131315171513Outdoorpower≥5,≤101215201215202520Totaloilmassoftransformation>10,≤501520251520253025transformer25252525anddistribution(t)>502025302025303530stationsNotes:17\n1ThefireseparationdistancebetweenCategoryBfactorybuildingsandimportantpublicbuildingsshouldnotbelessthan50m;thefireseparationdistancebetweenCategoryBfactorybuildingsandopenflameorsparkingsiteshouldnotbelessthan30m.Thefireseparationdistancebetweensingle-/multi-storeyCategoryEfactorybuildingsaswellasthatbetweenthemandCategoryEstoragesmaybereducedby2maccordingtothosespecifiedinthistable.Thefireseparationdistancebetweensingle-/multi-storeyCategoryEfactorybuildingsandcivilbuildingsmaybedeterminedaccordingtotherequirementsof5.2.2inthiscode.TheseparateresidentialbuildingssetforCategoriesC,DandEfactorybuildingsshallbedeterminedaccordingtotherequirementsofcivilbuildings.Thefireseparationdistancebetweenthoseresidentialbuildingsandtheirfactorybuildingsshallnotbelessthan6m.Ifadjacentarrangementisreallyrequired,itshallmeettherequirementsofNotes2and3inthistable.2Whentheadjacenthigherexteriorwalloftwofactorybuildingsisthefirewall,theadjacentexteriorwallonanysideoftwoadjacentbuildingswithClassIorIIfireresistancewiththesameheightisthefirewallandthefireresistanceratingoftheroofisnotlessthan1.00h,thefireseparationdistanceisnotlimited,butthedistancebetweenCategoryAfactorybuildingsshallnotbelessthan4m.IftwoadjacentexteriorwallsoftwoCategoriesC,DandEfactorybuildingsarenon-combustible,thesumoftheoccupiedareaofdoor,windoworopeningineachwallshallnotbegreaterthan5%oftheexteriorwallareawhenthereisnoexposedcombustibleeave;inaddition,ifthedoor,windoworopeningisnotoppositetoeachother,theirfireseparationdistancemaybereducedby25%accordingtothosespecifiedinthistable.CategoriesAandBfactorybuildings(storages)shallnotbeadjacenttothebuildingsnotspecifiedin3.3.5ofthiscode.3AsfortwofactorybuildingswithClassIorIIfireresistance,wheretheadjacentlowerexteriorwallisfirewallandtheroofofthelowerfactorybuildinghasnoskylightandwithfireresistanceratingnotlessthan1.00h,orClassAfiredoorandwindoworwatercurtainforfirecompartmentarearrangedfortheopeningsofdoorandwindowintheadjacenthigherexteriorwallorfirerollershutterisarrangedforthemaccordingto6.5.3ofthiscode,thefireseparationdistancebetweenCategoriesAandBfactorybuildingsshallnotbelessthan46m,andthatbetweenCategoriesC,DandEfactorybuildingsshallnotbelessthan4m.4Theoilmassofmaintransformerinthepowerplantmaybedeterminedbyunitset.5AsfortheexistingfactorybuildingswiththefireresistanceclasslowerthanIV,theirfireresistanceclassmaybedeemedasClassIV.6WhereCategoriesC,DandEfactorybuildingsareadjacenttoCategoriesC,DandEstorages,theyshallmeettherequirementsofNotes2and3inthistable.18\n3.4.2ThefireseparationdistancebetweenCategoryAfactorybuildingsandimportantpublicbuildingsshallnotbelessthan50m;thefireseparationdistancebetweenCategoryAfactorybuildingsandopenflameorsparkingsiteshallnotbelessthan30m.3.4.3ThefireseparationdistancebetweenCategoryAfactorybuildingswithcombustiblegasorsteamandrailwayorroadshallnotbelessthanthosespecifiedinTable3.4.3.However,ifsafetymeasuresaretakenfortheloadingandunloadinglinesofrailwayinCategoryAfactorybuildings,theirfireseparationdistancemaynotbelimitedbythosespecifiedinTable3.4.3.Table3.4.3FireSeparationDistance(m)betweenCategoryAFactoryBuildingswithCombustibleGasorSteamandRailwayorRoadCenterlineofoff-factoryCenterlineofin-factoryOff-factoryIn-factoryroadsideNamerailwayrailwayroadsidePrimarySecondaryCategoryAfactory302015105buildings3.4.4Thefireseparationdistancebetweenhigh-risefactorybuildingandClassA,B,Cliquidtanks,combustibleandcombustion-supportinggastank,LPGtankorstackyardforcombustibles(exceptcoalandcokeyards)shallmeettherequirementsofChapter4inthiscode,andshallnotbelessthan13m.3.4.5WhereCategoriesC,DandEfactorybuildingsandcivilbuildingsreachClassIorIIfireresistance,theirfireseparationdistancemaybereducedproperly,butshallmeetthefollowingrequirements:1Wherethehigherexteriorwallortheexteriorwallwithin15mhigherthantheroofoftheadjacentlowerbuildingisfirewallwithoutdoor,windoworopening,theirfireseparationdistanceisnotlimited;2Iftheadjacentlowerexteriorwallisfirewallandtheroofhasnoskylightortheopeningandthefireresistanceratingofroofisnotlessthan1.00h,ortheadjacenthigherexteriorwallisfirewallandfirecontrolmeasuresaretakenfortheopeninginthewall,theirfireseparationdistancemaybeproperlyreduced,butshallnotbelessthan4m.3.4.6Ifchemicalflammableequipmentisarrangedoutsidethefactorybuildings,thefireseparationdistancebetweentheexternalwallofsuchequipmentandtheexternalwallofoutdoorequipmentarrangedoutsidetheadjacentfactorybuildingsortheexteriorwalloftheadjacentfactorybuildingsshallnotbelessthanthosespecifiedin3.4.1ofthiscode.Theoutdoorequipmentfabricatedwithnon-combustiblematerialmaybedeterminedaccordingtobuildingswithClassIorIIfireresistance.IfClassCliquidtankwiththetotalvolumenotgreaterthan15m3isdirectlyburiedoutsidetheexteriorwallofthefactorybuildingsandtheexteriorwallwithin4.0mfromthetankisfirewall,theirfireseparationdistanceisnotlimited.3.4.7AsforthesameU-shapedororographicfactorybuilding,thefireseparationdistancebetweentwoadjacentwingsshouldnotbelessthanthosespecifiedin3.4.1ofthiscode.However,wheretheoccupiedareaofthefactorybuildingislessthanthemaximumpermissiblebuildingareaofeachfirecompartmentspecifiedin3.3.1ofthiscode,suchfireseparationdistancemaybe6m.3.4.8Excepthigh-risefactorybuildingsandCategoryAfactorybuildings,wherethesumoftheoccupiedareaofseveralfactorybuildingsofothercategoriesislessthanthemaximum19\npermissiblebuildingareaoffirecompartmentspecifiedin3.3.1ofthiscode(themaximumpermissiblebuildingareaoffirecompartmentissubjecttothesmallerone,butshallnotbegreaterthan10,000m2ifitisnotlimited),theycanbearrangedbygroup.Wheretheheightoffactorybuildingsisnotgreaterthan7m,thefireseparationdistancebetweenfactorybuildingsinagroupshallnotbelessthan4m;wheretheheightoffactorybuildingsisgreaterthan7m,thefireseparationdistancebetweenfactorybuildingsinagroupshallnotbelessthan6m.Thefireseparationdistancebetweengroupsorbetweengroupandadjacentbuildingsshallbesubjecttotheonewithinferiorfireresistanceclassandshallbedeterminedaccordingtothosespecifiedin3.4.1ofthiscode.3.4.9ClassIoilfillingstation,ClassIgasfillingstationandClassIoil&gasfillingstationshallnotbearrangedinurbanbuilt-uparea.3.4.10Asfortheclassificationofoilfillingstation,gasfillingstationandoil&gasfillingstation,thefireseparationdistancefromoilfillingstation,gasfillingstation,oil&gasfillingstationaswellastheiroil(gas)dispenser,oil(gas)tanktooff-stationopenflamelocation,sparkingsite,building,railwayorroad,andbetweenin-stationbuildingsorfacilities,theyshallmeettherequirementsofthecurrentnationalstandard"CodeforDesignandConstructionofAutomobileGasolineandGasFillingStation"(GB50156).3.4.11Asfortheoutdoorpowertransformationanddistributionstationswiththevoltageofelectricpowersystembetween35kV~500kVandthecapacityofeachtransformernotlessthan10MV·A,aswellastheoutdoorstepdownsubstationswiththetotaloilmassoftransformersofindustrialenterprisesgreaterthan5t,thefireseparationdistancebetweenthemandotherbuildingsshallnotbelessthanthosespecifiedin3.4.1and3.5.1ofthiscode.3.4.12Thespacingbetweenthefenceandthebuildingsinthefactoryareashouldnotbelessthan5m,thespacingbetweenbuildingsonthebothsidesofthefenceshallmeetthefireseparationdistancerequirementsforcorrespondingbuildings.3.5FireSeparationDistanceofStorages3.5.1ThefireseparationdistancebetweenCategoryAstoragesaswellasbetweenthemandotherbuilding,openflamelocation,sparkingsite,railwayorroadshallnotbelessthanthosespecifiedinTable3.5.1.20\nTable3.5.1FireSeparationDistance(m)betweenCategoryAStorageasWellasBetweenThemandOtherBuilding,OpenFlameLocation,SparkingSite,RailwayorRoadCategoryAstorage(storagecapacity,t)CategoryACategoryAstoredNamestoredarticlesarticlesItems1,2,5,Items3and4and6≤5>5≤10>10High-risecivilbuildingsandimportantpublicbuildings50Podium,othercivilbuildings,openflamelocationsorsparkingsites30402530CategoryAstorages20202020ClassesIandII15201215FactorybuildingsandCategoriesB,C,DandEstoragesClassIII20251520ClassIV25302025Outdoorpowertransformationanddistributionstationswiththevoltageofelectricpowersystembetween35~500kVandthecapacityofeachtransformernotlessthan10MV·A,aswell30402530asoutdoorstepdownsubstationswiththetotaloilmassoftransformersofindustrialenterprisesgreaterthan5tCenterlineofoff-factoryrailway40Centerlineofin-factoryrailway30Off-factoryroadside20Primary10In-factoryroadsideSecondary5Note:Wherethestoredquantityofitems3and4articlesisnotgreaterthan2tandthestoredquantityofItems1,2,5and6articlesisnotgreaterthan5t,thefireseparationdistancebetweenCategoryAstoragesshallnotbelessthan12mandthefireseparationdistancebetweenCategoryAstorageandhigh-risestorageshallnotbelessthan13m.3.5.2Unlessotherwisestatedinthiscode,thefireseparationdistancebetweenCategoriesB,C,DandEstoragesaswellasbetweenthemandcivilbuildingsshallnotbelessthanthosespecifiedinTable3.5.2.21\nTable3.5.2FireSeparationDistance(m)betweenCategoriesB,C,DandEStoragesasWellasbetweenThemandCivilBuildingsCategoriesDandECategoryBstoragesCategoryCstoragesstoragesSingle-/multi-storHigh-risSingle-/multi-storeHigh-risSingle-/multi-storeHigh-risNameeyeyeyeClasseClassesIClassesIClassClassClassesIClassClassClassClassesIClassIIIsIandandIIandIIIIIIVandIIIIIIIIVandIIIIClasses1012131012141310121413CategorieSingle-/multi-storIandIIsB,C,DeyClassIII1214151214161512141615andEClassIV1416171416181714161817storagesClassesHigh-rise1315131315171313151713IandIIClassesPodiumand1012141310121413IandIIsingle-/multi-store25ClassIII1214161512141615yCivilClassIV1416181714161817buildingsCategor2025252015181815yIHigh-rise50Categor1520201513151513yIINotes:1Thefireseparationdistancebetweensingle-/multi-storeyCategoryEstoragesmaybereducedby2maccordingtothosespecifiedinthistable.2Wheretheadjacentexternalwallsoftwostoragesarefirewalls,thefireseparationdistancemaybedecreased,butitshallnotbelessthan6mforCategoryCstorages,andshallnotbelessthan4mforCategoriesDandEstorages.Theadjacenthigherexteriorwalloftwostoragesisfirewall.OrwheretheexternalwallonanysideoftwoadjacentbuildingswithClassIorIIfireresistancewiththesameheightisfirewallandthefireresistanceratingoftheroofisnotlessthan1.00h,andwherethetotaloccupiedareaisnotlargerthanthemaximumpermissibleoccupiedareaofastoragein3.3.2ofthiscode,thefireseparationdistanceisnotlimited.3AsforCategoryBstorages(exceptthoseforCategoryBItem6articles),theirfireseparationdistancetocivilbuildingsshouldnotbelessthan25m,andtheirfireseparationdistancetoimportantpublicbuildingsshallnotbelessthan50m,andtheirfireseparationdistancetorailwayorroadshouldnotbelessthanthatbetweenCategoryAstorageandrailwayorroadasspecifiedinTable3.5.1.3.5.3WhereCategoriesDandEstoragesandcivilbuildingsreachClassIorIIfireresistance,theirfireseparationdistancemaybereducedproperly,butshallmeetthefollowingrequirements:1Wherethehigherexteriorwallortheexteriorwallwithin15mhigherthantheroofoftheadjacentlowerbuildingisfirewallwithoutdoor,windoworopening,theirfireseparationdistanceisnotlimited;2Iftheadjacentlowerexteriorwallisfirewallandtheroofhasnoskylightoropening,22\nandthefireresistanceratingoftheroofisnotlessthan1.00h,ortheadjacenthigherexteriorwallisfirewallandfirecontrolmeasuresaretakenfortheopeninginthewall,theirfireseparationdistancemaybeproperlyreduced,butshallnotbelessthan4m.3.5.4ThefireseparationdistancebetweengrainsiloandotherbuildingandgrainsilogroupshallnotbelessthanthosespecifiedinTable3.5.4.Table3.5.4FireSeparationDistancebetweenGrainSiloandOtherBuildingandGrainSiloGroup(m)GrainsiloGrainsquatsiloOtherbuildingTotalstoredquantityofNameLevelLevelLevelgrainsW(t)W≤40,00040,00050,000W≤50,000W>50,00023450050,000252530GrainsquatW≤50,00020202520252025-siloW>50,000252530-Notes:1Wheregrainsiloandgrainsquatsiloaswellasoperationtower,absorptiontoweranddistributionstationconstituteanintegralprocessunitcluster,thefireseparationdistancebetweenbuildingsintheclusterisnotsubjecttothistable.2Thestoredquantityofeachindependentsilointhegrainsquatsiloclustershallnotbegreaterthan10,000t.3.5.5Thespacingbetweenthefenceofthestorageareaandthebuildingsinthestorageareashouldnotbelessthan5m.Thespacingbetweenbuildingsonbothsidesofthefenceshallmeetthefireseparationdistancerequirementsforappropriatebuildings.3.6ExplosionPreventionofFactoryBuildingsandStorages3.6.1TheCategoriesAandBfactorybuildingswithexplosiveriskshouldbearrangedindependentlyandshouldbeopenorsemi-open.Inaddition,reinforcedconcreteorsteelframeandbentstructureshouldbeadoptedastheirload-bearingstructure.3.6.2Asforfactorybuildingoranyoftheirpositionswithexplosiverisk,pressurerelieffacilitiesshallbearranged.3.6.3Thepressurerelieffacilitiesshouldadoptlightroofslab,lightwall,easy-to-relieve-pressuredoors,windows,etc.,andmaterialswithoutgeneratingsharpfragmentsinexplosion,suchassafetyglass,shallbeadopted.Thepressurerelieffacilitiesshallbekeptawayfromcrowdedlocationsandmainroads,andshouldbeclosetopositionswithexplosiverisk.Themassoflightroofslabandwallbodyofthepressurerelieffacilitiesshouldnotbegreaterthan60kg/m2.Measuresavoidingiceandsnowaccumulationshallbetakenforthepressurerelieffacilitiesontheroof.3.6.4Thepressurereliefareaoffactorybuildingsshouldbecalculatedaccordingtothefollowingformula.However,wherethelength-diameterratiooffactorybuildingsisgreaterthan3,theyshouldbedividedintoseveralcalculatingsectionswiththelength-diameterrationotgreaterthan3.Thepubliccross-sectionofallcalculatingsectionsshallnotserveasthepressurereliefarea:23\n2A10CV3(3.6.4)Where,A-thepressurereliefarea,m2;V-thevolumeoffactorybuilding,m3;C-thepressurereliefratio,whichmaybeselectedaccordingtothosespecifiedinTable3.6.4,m2/m3.Table3.6.4CategoryofExplosiveSubstancesinFactoryBuildingsandSpecifiedValueofPressureReliefRatio(m2/m3)CategoryofexplosivesubstancesinfactorybuildingsCvalueAmmonia,grain,paper,leather,lead,chromiumandcopperwithK-1dustlessthan10MPa·m·s≥0.030Woodchip,carbondust,pulverizedcoal,stibiumandtinwithK-1dustlargerthanorequalto10MPa·m·sandless≥0.055thanorequalto30MPa·m·s-1Acetone,gasoline,methanol,LPG,methane,sprayingshopordryingroom,phenolresin,aluminium,magnesium≥0.110andzirconiumwithK-1dustgreaterthan30MPa·m·sEthylene≥0.160Acetylene≥0.200Hydrogen≥0.250Notes:1Thelength-diameterratioreferstotheratiooftheproductofthemaximumlengthinthegeometricshapeofbuildingplaneandtheperimeterofitscross-sectionto4.0timesthecross-sectionareaofthebuilding.2Kdustreferstothedustexplosionindex.3.6.5AsforCategoryAfactorybuildingsfullofcombustiblegasorsteamlighterthanair,lightroofslabshouldbeadoptedasthepressurereliefarea.Theceilingshallbeflatandsmoothwithoutdeadcorner.Theupperspaceofthefactorybuildingsshallbewellventilated.3.6.6CategoryAfactorybuildingsfullofcombustiblegasorsteamheavierthanairaswellasCategoryBfactorybuildingswithexplosiveriskofdustandfibershallmeetthefollowingrequirements:1Spark-freefloorshallbeadopted.Ifinsulatingmaterialsareadoptedasanintegrallayer,anti-staticmeasuresshallbetaken.2Asforfactorybuildingsemittingcombustibledustorfiber,theirinternalsurfaceshallbeflat,smoothandconvenientforcleaning.3Trenchshouldnotbearrangedinthefactorybuildings.Iftrenchmustbearranged,itscoverplateshallbetightandeffectivemeasuresshallbetakentopreventcombustiblegas,steam,dustorfiberfromaccumulatinginthetrench.Inaddition,fire-proofmaterialsshallbeusedtosealtheconnectionbetweentrenchandadjacentfactorybuildings.3.6.7AsforCategoriesAandBproductionpositionswithexplosiverisk,theyshouldbearrangednearbypressurerelieffacilitiesclosetotheexteriorwallofsingle-storeyfactorybuildingsortheexteriorwallofthetopfloorofmulti-storeyfactorybuildings.Theequipmentwithexplosiveriskshouldbearrangedawayfromthemainloadbearingmembersoffactorybuildings,suchasbeamandcolumn.3.6.8ThemastercontrolroomofCategoriesAandBfactorybuildingswithexplosiveriskshallbearrangedindependently.24\n3.6.9ThebranchcontrolroomofCategoriesAandBfactorybuildingswithexplosiveriskshouldbearrangedindependently.Ifitisadjacenttotheexteriorwall,firepartitionwallwithfireresistanceratingnotlessthan3.00hshallbeadoptedtoseparateitfromotherpositions.3.6.10Protectivemeasures,likefoyer,shallbetakenforstaircase,externalstairwayinareawithexplosiveriskorconnectionpartbetweenareawithexplosiveriskanditsadjacentarea.Thepartitionwalloffoyershallbefirepartitionwallwithfireresistanceratingnotlessthan2.00h;CategoryAfiredoorshallbeadoptedandstaggeredwiththedoorofstaircase.3.6.11AsforfactorybuildingsforusingandproducingClassA,BandCliquids,theirpipeandtrenchshallnotbeconnectedwiththoseofadjacentfactorybuildings.Oil-separatingfacilitiesshallbearrangedforsewers.3.6.12ThestoragesforClassA,BandCliquidsshallbearrangedwithfacilitiestopreventliquidfromdispersion.Asforstoragesforarticlespronetocombustionandexplosionincaseofwetenvironment,measuresshallbetakentopreventthemfromwaterimmersion.3.6.13Asforsilowithdustexplosionhazards,itstopcoverplateshallbearrangedwithnecessarypressurerelieffacilities.Thepressurereliefareaoftheoperationtoweranduppercorridorofgrainsiloshallbedeterminedthroughcalculationaccordingto3.6.4ofthiscode.Explosionpreventionmeasuresshallbetakenforothergrainstoragefacilitieswithdustexplosionhazards.3.6.14Asforstoragesoranyoftheirpositionswithexplosiverisk,explosionpreventionmeasuresshouldbetakenandpressurerelieffacilitiesshallbearrangedaccordingtotherequirementsofthissection.3.7SafeEvacuationofFactoryBuildings3.7.1Thesafetyexitsoffactorybuildingshallbedispersedlyarranged.Asforeveryfirecompartmentoreverystoreyinafirecompartment,thehorizontaldistancebetweenthenearestedgesofthetwoadjacentsafetyexitsshallnotbelessthan5m.3.7.2Asforeveryfirecompartmentinthefactorybuildingsoreverystoreyinafirecompartment,thequantityofthesafetyexitsshallbedeterminedthroughcalculationandshallnotbelessthan2;incasethefollowingconditionsaremet,itisallowedtoarrangeonesafetyexit:1AsforCategoryAfactorybuildings,thebuildingareaofeachfloorisnotgreaterthan100m2andthenumberofpersonneloperatingsimultaneouslyislessthanorequalto5;2AsforCategoryBfactorybuildings,thebuildingareaofeachfloorisnotgreaterthan150m2andthenumberofpersonneloperatingsimultaneouslyislessthanorequalto10;3AsforCategoryCfactorybuildings,thebuildingareaofeachfloorisnotgreaterthan250m2andthenumberofpersonneloperatingsimultaneouslyislessthanorequalto20;4AsforCategoriesDandEfactorybuildings,thebuildingareaofeachfloorisnotgreaterthan400m2andthenumberofpersonneloperatingsimultaneouslyislessthanorequalto30;25\n5Asforundergroundorsemi-undergroundfactorybuildings(includingbasementandsemi-basement),thebuildingareaofeachfloorisnotgreaterthan50m2andthenumberofpersonneloperatingsimultaneouslyislessthanorequalto15;3.7.3Asforundergroundorsemi-undergroundfactorybuildings(includingbasementandsemi-basement),ifmanyfirecompartmentsareadjacentlyarrangedandseparatedwithfirewall,theClassAfiredooronfirewallandleadingtoadjacentfirecompartmentmaybeadoptedforeachfirecompartmentassecondsafetyexit,buteachfirecompartmentmustbeatleastwithoneindependentsafetyexitdirectlyleadingtooutdoors.3.7.4ThelineardistancebetweenanypointandthenearestsafetyexitinthefactorybuildingsshallnotbegreaterthanthosespecifiedinTable3.7.4.Table3.7.4LinearDistancebetweenAnyPointandtheNearestSafetyExitintheFactoryBuildings(m)FirehazardHigh-riseUndergroundorsemi-undergroundfactoryFireresistanceSingle-storeyMulti-storeycategoryoffactorybuilding(includingbasementandclassfactorybuildingfactorybuildingproductionbuildingsemi-basement)AClassesIandII3025--BClassesIandII755030-ClassesIandII806030C40ClassIII6040-ClassesIandIINotlimitedNotlimited5045DClassIII6050--ClassIV50---ClassesIandIINotlimitedNotlimited7560EClassIII10075--ClassIV60---3.7.5Therespectivetotalclearwidthofevacuationstairway,passagewayanddoorinthefactorybuildingsshallbedeterminedthroughcalculationaccordingtothenumberofevacuatedpersonsandthebasisthattheminimumclearwidthforevacuationper100personsisnotlessthanthosespecifiedinTable3.7.5.However,theminimumclearwidthofevacuationstairway,evacuationpassagewayanddoorshouldnotbelessthan1.10m,1.40mand0.90mrespectively.Ifthenumberofevacuatedpersonsateachstoryisnotequal,thetotalclearwidthofevacuationstairwayshallbecalculatedbystories,thetotalclearwidthofthelowerstaircaseshallbecalculatedaccordingtothenumberofevacuatedpersonsofthecurrentstoryorupperstorywiththelargestnumberofevacuatedpersons.Table3.7.5MinimumClearWidthforEvacuationper100PersonsofEvacuationStairway,PassagewayandDoorintheFactoryBuildingsNumberoffactorybuildingstoreys(storey)1~23≥4Minimumclearwidthforevacuation(m/hundredpersons)0.600.801.00Thetotalclearwidthoftheexteriordooronthe1stfloorshallbecalculatedaccordingtothenumberofevacuatedpersonsofthecurrentstoryorupperstorywiththelargestnumberofevacuatedpersons,andtheminimumclearwidthofthedoorshallnotbelessthan1.20m.3.7.6Enclosedstaircaseorexternalstairwayshallbeadoptedastheevacuationstairwayforhigh-risefactorybuildingandCategoriesA,BandCmulti-storeyfactory26\nbuildings.Asforfactorybuildingwiththebuildingheightgreaterthan32mandnumberofpeopleateachstoryexceeding10,smoke-proofstaircaseorexternalstairwayshallbeadopted.3.8SafeEvacuationofStorages3.8.1Thesafetyexitsofstorageshallbedispersedlyarranged.Asforeveryfirecompartmentoreverystoreyinafirecompartment,thehorizontaldistancebetweenthenearestedgesofthetwoadjacentescapeexitsshallnotbelessthan5m.3.8.2Thenumberofsafetyexitsforeachstorageshallnotbelessthan2;ifthefloorareaofastorageisnotgreaterthan300m2,itisallowedtoarrangeonesafetyexit.Atleasttwoexitsshouldbearrangedforeachfirecompartmentinstorageforleadingtoevacuationpassageway,stairwayoroutdoor.Wherethebuildingareaoffirecompartmentisnotgreaterthan100m2,itisallowedtoarrangeoneexit.ClassBfiredoorshallbeadoptedasthedoorleadingtoevacuationpassagewayorstairway.3.8.3Thenumberofsafetyexitsofundergroundorsemi-undergroundstorages(includingbasementandsemi-basement)shallnotbelessthan2;ifthebuildingareaisnotgreaterthan100m2,itisallowedtoarrangeonesafetyexit.Asforundergroundorsemi-undergroundstorages(includingbasementandsemi-basement),ifmanyfirecompartmentsareadjacentlyarrangedandseparatedwithfirewall,theClassAfiredooronfirewallandleadingtoadjacentfirecompartmentmaybeadoptedasthesecondsafetyexitforeachfirecompartment,buteachfirecompartmentmustbeatleastwithonesafetyexitdirectlyleadingtooutdoors.3.8.4Thesafeevacuationdesignofrefrigerationstorage,grainsiloandtreasuryshallmeettherequirementsofthecurrentnationalstandards"CodeforDesignofColdStore"(GB50072)and"CodeforDesignofGrainSteelSilos"(GB50322)respectively.3.8.5Whereupper-layerareaofgrainsiloislessthan1,000m2andtherearenotmorethan2operatingpersonnel,itisallowedtoarrangeonesafetyexit.3.8.6Theoutdoormetalladderinstorageandsilomeetingtherequirementsof6.4.5inthiscodemayserveasevacuationstairway,butthefireresistanceratingoftheexternalstairwaylandingofsiloshallnotbelessthan0.25h.3.8.7Enclosedstaircaseshallbeadoptedfortheevacuationstairwayofhigh-risestorage.3.8.8Exceptformulti-storeyCategoryEstorageswithClassesIandIIfireresistance,theliftingfacilitiesforverticallyhandlingarticlesinotherstoragesshouldbearrangedoutsidethestorage.Iftheymustbearrangedinthestorage,theyshallbearrangedinshaftwiththefireresistanceratingofshaftwallnotlessthan2.00h.ClassBfiredoororfirerollershuttercomplyingwiththerequirementsof6.5.3inthiscodeshallbearrangedfortheentranceofinternalandexternalliftingfacilitiesleadingtothestorage.27\n4ClassA,B,CLiquidandGasTanks(TankFarm)andStackyardforCombustibles4.1GeneralRequirements4.1.1ClassA,BandCliquidtankfarm,LPGtankfarm,combustibleandcombustion-supportinggastankfarmandstackyardforcombustiblesshallbearrangedattheedgeofurban(area)orintherelativelyindependentsafetyzoneandshouldbearrangedatthewindwardsideinthewinddirectionwiththeannualminimumfrequency.ClassA,BandCliquidtanks(tankfarm)shouldbearrangedinthezonewithlowterrain.Wheretheyarearrangedinthezonewithhighterrain,securityfacilitiesshallbeadopted.LPGtank(tankfarm)shouldbearrangedinthezonewhereliquefiedpetroleumisnoteasytobestoredsuchasinplaceswithflatandopenterrain.4.1.2CategoryAliquidinbarrelorbottleshallnotbestoredoutdoors.4.1.3Non-combustiblesolidprotectionwallwiththeheightnotlessthan1.0mshallbearrangedaroundtheLPGtankgrouportankfarm.4.1.4ClassA,BandCliquidtankfarm,LPGtankfarm,combustibleandcombustion-supportinggastankfarmandstackyardforcombustiblesshallbearrangedseparatelyfromtheloadingarea,auxiliaryproductionareaandofficearea.4.1.5ThesmallesthorizontaldistancebetweenClassA,BandCliquidtanks,LPGtanks,combustibleandcombustion-supportinggastanks,combustiblesstacksandoverheadpowerlinesshallmeettherequirementsof10.2.1ofthiscode.4.2FireSeparationDistanceofClassA,B,CLiquidTanks(TankFarm)4.2.1ThefireseparationdistancebetweenClassA,BandCliquidtanks(tankfarm)/barreledClassBandCliquidstackyardandotherbuildingsshallnotbelessthanthosespecifiedinTable4.2.1.Table4.2.1FireSeparationDistancebetweenClassA,BandCLiquidTanks(TankFarm)/BarreledClassBandCLiquidStackyardandOtherBuildings(m)BuildingsOutdoorTotalvolumeofatankClassesIandIIsubstationandCategoryfarmorstorageyardHigh-risecivilPodiumClassIIIClassIVdistributionV(m3)buildingOtherbuildingstation1≤V<504012152030ClassAandBliquid50≤V<2005015202535tanks(tankfarms)200≤V<1,00060202530401,000≤V<5,00070253040505≤V<2504012152024CategoryCliquid250≤V<1,0005015202528tank(tankfarm)1,000≤V<5,00060202530325,000≤V<25,000702530404028\nNotes:1WhereClassA,B,Cliquidtanksarearrangedinthesametankfarm,thetotalvolumeofthetankfarmmaybeconvertedaccordingtofollows:1m3ClassAandBliquidsisequivalentto5m3ClassCliquid.2Thedistancebetweentheoutsidefootinglineofthefiredikeofthestoragetankandtheadjacentbuildingshallnotbelessthan10m.3ThefireseparationdistancebetweenClassA,BandCliquidtankfarmwithfixedrooforsemi-openstackyard/barreledClassBandCliquidstackyardandCategoryAfactorybuildings(storage)/civilbuildingshallbeincreasedby25%onbasisofthosespecifiedinthistable,andthatbetweenClassAandBliquidtankfarmswithfixedrooforsemi-openstackyard/barreledClassBandCliquidstackyardandCategoryAfactorybuildings(storage)/podium/single-/multi-storeycivilbuildingsshallnotbelessthan25m,andthatfromtheopenflameorsparkingsiteshallbeincreasedby25%onbasisofthoseforClassIVfireresistancebuildingspecifiedinthistable.4Thefireseparationdistancebetweentankfarmwithfloatingrooforliquidtankfarmwiththeflashpointover120℃shallbedecreasedby25%onbasisofthosespecifiedinthistable.5Incaseseveraltankfarmsarearrangedinthesamestoragearea,thefireseparationdistancebetweentankfarmsshallnotbelessthanthelargervalueofthefireseparationdistancespecifiedinthistablebetweentankfarmwithcorrespondingvolumeandbuildingwithClassIVfireresistance.6AsforthedirectlyburiedClassA,BandCliquidhorizontaltanks,wherethevolumeofsingletankisnogreaterthan50m3andthetotalvolumeisnotgreaterthan200m3,thefireseparationdistancebetweenitandthebuildingshallbedecreasedby50%onbasisofthosespecifiedinthistable.7Outdoorpowertransformationanddistributionstationsrefertothosewiththevoltageofelectricpowersystembetween35kV~500kVandthecapacityofeachtransformernotlessthan10MV·A,aswellasoutdoorstepdownsubstationswiththetotaloilmassoftransformersinindustrialenterprisesgreaterthan5t.4.2.2ThefireseparationdistancebetweenClassA,BandCliquidtanksshallnotbelessthanthosespecifiedinTable4.2.2.Table4.2.2FireSeparationDistancebetweenClassA,BandCLiquidTanks(m)FixedrooftankFloatingrooftankorstoragetanksetwithHorizontalCategoryOvergroundSemi-undergroundUndergroundnitrogen-fillingprotectiontanktypetypetypeequipmentClassAandV≤1,0000.75DVolumeofBliquid0.5D0.4D0.4DsingleV>1,0000.6Dtanks≥0.8mtankClassCV(m3)Notlimited0.4DNotlimitedNotlimited-liquidtankNotes:1Disthediameter(m)oftheadjacentlargerverticalstoragetank,andthediameteroftherectangularstoragetankishalfofthesumofthelong-sideandshort-side.2Thefireseparationdistancebetweentankswithdifferenceliquidsaswellasthatbetweenstoragetanksofdifferencetypesshallnotbelessthanthelargervaluespecifiedinthistable.3Thefireseparationdistancebetweentworowsofhorizontaltanksshallnotbelessthan3m.4Wherethevolumeofsingletankisnotgreaterthan1,000m3andfixedcoolingsystemisadopted,thefireseparationdistancebetweenovergroundfixedrooftanksofClassAandBliquidsshallnotbelessthan0.6D.5Whereovergroundstoragetankissetwithbaseinjectionfoamextinguishingsystem,fixedcoolingwatersystemandfoamfireextinguishingfacilityusedforputtingoutliquidfireinthefiredike,thefireseparationdistancebetween29\nstoragetanksmaybereducedproperlyandshouldnotbelessthan0.4D.6Asfortheliquidwiththeflashpointhigherthan120℃,wherethevolumeofsingletankislargerthan1,000m3,thefireseparationdistancebetweenstoragetanksshallnotbelessthan5m;wherethevolumeofsingletankisnotgreaterthan1,000m3,thefireseparationdistancebetweenstoragetanksshallnotbelessthan2m.4.2.3IncaseClassA,BandCliquidtanksarearrangedbygroup,thefollowingrequirementsshallbemet:1ThevolumeofsingletankandtotalvolumeofthestoragetankinthegroupshallnotbegreaterthanthosespecifiedinTable4.2.3.Table4.2.3MaximumVolumeofClassA,BandCLiquidTanksArrangedbyGroupCategoryMaximumvolumeofsingletank(m3)Maximumvolumeofagroupofstoragetank(m3)ClassAandBliquids2001,000ClassCliquid5003,0002Thestoragetanksinagroupshallnotbearrangedinmorethantworows.ThefireseparationdistancebetweenverticaltanksforClassAandBliquidsshallnotbelessthan2m,andthatbetweenhorizontaltanksshallnotbelessthan0.8m;thefireseparationdistancebetweenClassCliquidtanksisNotlimited.3Thefireseparationdistancebetweenstoragetankgroupsshallbeconvertedintostandardsingletanksofthesameclassaccordingtotheformandtotalvolumeofstoragetankingroupandshallbedeterminedaccordingtotherequirementsof4.2.2ofthiscode.4.2.4Asfortheovergroundandsemi-undergroundtankfarmsofClassA,BandCliquids,thestoragetankswithsameorsimilarfirehazardcategoryshouldbearrangedineveryfiredike.Storagetankforboil-overoilandthatfornonboil-overoilshallnotbearrangedinthesamefiredike.Overgroundandsemi-undergroundstoragetanksshallnotbearrangedinthesamefiredikeasundergroundstoragetank.4.2.5Asforovergroundandsemi-undergroundstoragetanksorstoragetankgroupusedforClassA,BandCliquids,thenon-combustiblefiredikeshallbearrangedaroundthem.Thearrangementoffiredikeshallmeetthefollowingrequirements:1Thestoragetanksinthefiredikeshouldnotbearrangedinmorethan2rows,thevolumeofsingletankshallnotbegreaterthan1,000m3andtheliquidtankswiththeflashpointhigherthan120℃shouldnotbearrangedinmorethan4rows;2Theeffectivevolumeoffiredikeshallnotbelessthanthevolumeofthemaximumstoragetanktherein.Asforfloatingrooftank,theeffectivevolumeoffiredikemaybehalfofthevolumeofthemaximumstorage.3Thehorizontaldistancefromtheinsidefootinglineofthefirediketotheouterwallofverticaltankshallnotbelessthanhalfofthestoragetankwallheight.Thehorizontaldistancefromtheinsidefootinglineoffirediketothehorizontaltankshallnotbelessthan3m.4Thedesignheightofthefiredikeshallbe0.2mhigherthanthecalculatedheightandtheheightshallbe1.0m~2.2m;footboardconvenientforthefire-fightingandrescuestaffgoinginandoutofthefiredikeshallbearrangedatproperpositionsofthefiredike.5Asfortheovergroundandsemi-undergroundstoragetanksusedforboil-overoil,onefiredikeorfirepreventionseparationdikeshallbearrangedforeverystorage30\ntank.6Asfortheoilysewer,thewatersealfacilitiesshallbearrangedattheexitofthefiredike;asforraindrainagepipe,closingandisolationdevicessuchasvalveshallbearranged.4.2.6Asforthesemi-openstackyardforClassAliquid,stackyardforbarreledClassBandCliquidsandliquidtanks(tankfarm)withflashpointhigherthan120℃,firedikemaynotbearrangedwherethefacilitiestopreventliquidflowareset.4.2.7ThefireseparationdistancebetweentheClassA,BandCliquidtanksandtheirpumproom/loadingandunloadingarmsshallnotbelessthanthosespecifiedinTable4.2.7.Table4.2.7FireSeparationDistancebetweenClassA,BandCLiquidTanksandTheirPumpRoom/LoadingandUnloadingArms(m)LiquidclassandstoragetankformPumproomRailwayorautomobileloadingandunloadingarmsDomerooftank1520ClassAandBliquidtanksFloatingrooftank1215ClassCliquidtank1012Notes:1AsforClassAandBliquidtankswithtotalvolumenotgreaterthan1,000m3andClassCliquidtankwithtotalvolumenotgreaterthan5,000m3,thefireseparationdistancemaybedecreasedby25%onbasisofthosespecifiedinthistable.2Thedistancebetweenpumproom/loadingandunloadingarmsandoutsidefootinglineoffiredikeofthestoragetankshallnotbelessthan5m.4.2.8ThefireseparationdistancebetweentheloadingandunloadingarmsoftheClassA,BandCliquidsandbuilding/in-factoryrailwaylineshallnotbelessthanthosespecifiedinTable4.2.8.Table4.2.8FireSeparationDistancebetweenLoadingandUnloadingArmsofClassA,BandCLiquidsandBuilding/In-factoryRailwayLine(m)BuildingIn-factoryrailwayNamePumproomClassesIandIIClassIIIClassIVlineLoadingandunloadingarmsofClassAandBliquids141618208LoadingandunloadingarmsofClassCliquid10121410Note:ThefireseparationdistancebetweentheloadingandunloadingarmsandClassA,BandCliquidloadingandunloadingrailwaylinefordirectlyloadingandunloadingisnotlimited.4.2.9ThefireseparationdistancebetweenClassA,BandCliquidtanksandrailway/roadshallnotbelessthanthosespecifiedinTable4.2.9.Table4.2.9FireSeparationDistancebetweenClassA,BandCLiquidTanksandRailway/Road(m)Centerlineofoff-factoryCenterlineofin-factoryIn-factoryroadsideNameOff-factoryroadsiderailwayrailwayMainSecondaryClassAandB3525201510liquidtanksClassCliquidtank3020151054.2.10Thedistancebetweenzero-positiontankandrailwayforloadingandunloadinglinewhichitbelongstoshallnotbelessthan6m.4.2.11Thefireseparationdistancebetweenthetanks(tankfarm)ofoildepotandbuilding,thearrangementofandfireseparationdistancebetweenthestoragetanksinoildepotandthefireseparationdistancebetweenstoragetankandsuchbuildingsaspumproomandloading31\nandunloadingarmsinoildepotshallmeettherequirementsofthecurrentnationalstandard"CodeforDesignofOilDepot"(GB50074).4.3FireSeparationDistanceofCombustibleandCombustion-supportingGasTanks(TankFarm)4.3.1Thefireseparationdistancebetweencombustiblegastankandbuilding/storagetank/stackyardshallmeetthefollowingrequirements:1Thefireseparationdistancebetweenwetcombustiblegastankandbuilding/storagetank/stackyardshallnotbelessthanthosespecifiedinTable4.3.1.Table4.3.1FireSeparationDistancebetweenWetCombustibleGasTankandBuilding/StorageTank/Stackyard(m)Wetcombustiblegastank(totalvolumeV,m3)NameV<1,0001,000≤V<10,00010,000≤V<50,00050,000≤V<100,000100,000≤V<300,000CategoryAstorageClassA,BandCliquidtanksStackyardforcombustibles2025303540OutdoorsubstationanddistributionstationOpenflameorsparkingsiteHigh-risecivilbuildings2530354045Podium;single-/multi-storeycivil1820253035buildingsClassesIandII1215202530OtherbuildingsClassIII1520253035ClassIV2025303540Note:Thetotalvolumeofcombustiblegastankwithconstantvolumeshallbecalculatedaccordingtotheproductofgeometricalvolumeofthestoragetank(m3)andthedesignedstoragepressure(absolutepressure,105Pa).2Thefireseparationdistancebetweencombustiblegastankwithconstantvolumeandbuilding/storagetank/stackyardshallnotbelessthanthosespecifiedinTable4.3.1.3Thefireseparationdistancebetweendrycombustiblegastankandbuilding/storagetank/stackyard:wherethedensityofthecombustiblegasisgreaterthanthatoftheair,thedistanceshallbeincreasedby25%onbasisofthosespecifiedinTable4.3.1;wherethedensityofcombustiblegasissmallerthanthatoftheair,thedistanceshallbedeterminedaccordingtothosespecifiedinTable4.3.1.4Asforthefireseparationdistancebetweensuchauxiliaryfacilitiesaswatersealedwell,oilpumproomandelevatorroomofwetordrycombustiblegastankandthisstoragetank,theymaybearrangedaccordingtotheprocessrequirements.5Thefireseparationdistancebetweencombustiblegastankwithvolumenotgreaterthan20m3anditsfactorybuildingisNotlimited;4.3.2Thefireseparationdistancebetweencombustiblegastanks(tankfarms)shallmeetthefollowingrequirements:1Thefireseparationdistancebetweenwetcombustiblegastanksorbetweendrycombustiblegastanksorbetweenwetcombustiblegastankanddrycombustiblegas32\ntankshallnotbelessthan1/2ofthediameterofadjacentlargertank.2Thefireseparationdistancebetweencombustiblegastankswithconstantvolumeshallnotbelessthan2/3ofthediameterofadjacentlargertank.3Thefireseparationdistancebetweencombustiblegastankwithconstantvolumeandwetordrycombustiblegastankshallnotbelessthan1/2ofthediameteroftheadjacentlargertank.4Wherethetotalvolumeofseveralcombustiblegastankswithconstantvolumeisgreaterthan200,000m3,theyshallbearrangedbygroup.Thefireseparationdistancebetweenhorizontaltankgroupsshallnotbelessthanhalfofthelengthoftheadjacentlargertank;thefireseparationdistancebetweensphericaltankgroupsshallnotbelessthanthediameteroftheadjacentlargertankandshallnotbelessthan20m.4.3.3Thefireseparationdistancebetweentheoxygentankandbuilding,storagetankandstackyardshallmeetthefollowingrequirements:1Thefireseparationdistancebetweenthewetoxygentankandbuilding,storagetankandstackyardshallnotbelessthanthosespecifiedinTable4.3.3.Table4.3.3FireSeparationDistancebetweentheWetOxygenTankandBuilding,StorageTankandStackyard(m)Wetoxygentank(totalvolumeV,m3)NameV≤1,0001,00050,000Openflameorsparkingsite253035ClassesA,B,Cliquidtanks,combustiblesstackyards,CategoryAwarehouses,outdoorpowertransformation202530anddistributionstationsCivilbuildings182025ClassesIandII101214OtherbuildingsClassIII121416ClassIV141618Note:Thetotalvolumeofoxygentankswithconstantvolumeshallbetheproductofgeometricvolume(m3)ofthetankmultipliedbythedesignedstoragepressure(absolutepressure105Pa).2Thefireseparationdistancebetweentheoxygentanksshallnotbelessthan1/2ofthediameterofadjacentlargertank.3Thefireseparationdistancebetweentheoxygentankandthecombustiblegastankshallnotbelessthanthediameterofadjacentlargertank.4Thefireseparationdistancebetweentheoxygentankwithconstantvolume,andbuilding,tankandstackyardshallnotbelessthanthosespecifiedinTable4.3.3.5Thefireseparationdistancebetweentheoxygentankandotheroxygengenerationfactorybuildingmaybedeterminedaccordingtotherequirementsoftheprocesslayout.6Thefireseparationdistancebetweentheoxygentankwithvolumenotgreaterthan50m3andtheirfactorybuildingisnotlimited.Note:1m3liquidoxygenisconvertedinto800m3gaseousoxygenunderstandardcondition.4.3.4Thefireseparationdistancebetweentheliquidoxygentankandbuilding,storagetankandstackyardshallmeettherequirementsforthefireseparationdistancebetweenwetoxygentankswiththecorrespondingvolumein4.3.3ofthiscode.Thedistancebetweentheliquid33\noxygentankanditspumproomshouldnotbelessthan3m.Thefireseparationdistancebetweentheliquidoxygentankwithtotalvolumelessthanorequalto3m3andotherbuildingsshallmeetthefollowingrequirements:1WhentheliquidoxygentankisarrangedintheindependentspecialbuildingwithClassesIandIIfireresistance,thefireseparationdistanceshallnotbelessthan10m;2WhentheliquidoxygentankisarrangedintheindependentspecialbuildingwithClassesIandIIfireresistance,andisseparatedagainstthebuildingbyfirewallwithoutdoor,windoworopening,thefireseparationdistanceisnotlimited;3Whentheliquidoxygentankstoredinlowtemperatureadoptsfirepreventionmeasures,thefireseparationdistanceshallnotbelessthan5m.Theliquidoxygentankatthegassourcestationofthemedicalliquidoxygentankinthemedicalandhealthorganizationsshallmeetthefollowingrequirements:1Thevolumeofsingletankshallnotbegreaterthan5m3andthetotalvolumeshouldnotbegreaterthan20m3;2Thedistancebetweentheadjacentstoragetanksshallnotbelessthan0.75timesofthelargesttankdiameter;3Thefireseparationdistancebetweenthemedicalliquidoxygentankandtheouterbuildingsofmedicalandhealthorganizationsshallmeettherequirementsof4.3.3inthiscode,andthefireseparationdistancebetweenthemedicalliquidoxygentankandtheinnerbuildingsofmedicalandhealthorganizationsshallmeettherequirementsofthecurrentnationalstandard"TechnicalCodeforMedicalGasesEngineering"(GB50751).4.3.5Combustiblesandasphaltpavementshallnotexistwithin5maroundtheliquidoxygentank.4.3.6Thefireseparationdistancebetweenthecombustible&combustion-supportinggastankandrailways&roadsshallnotbelessthanthosespecifiedinTable4.3.6.Table4.3.6FireSeparationDistancebetweenCombustible&Combustion-supportingGasTankandRailways&Roads(m)CenterlineofCenterlineofIn-factoryroadsideNameOff-factoryroadsideoff-factoryrailwayin-factoryrailwayMainSecondaryCombustible&252015105combustion-supportinggastank4.3.7Thefireseparationdistancebetweentheliquidhydrogenandliquidammoniatanksandbuilding,storagetankandstackyardshallbedeterminedbythereductionof25%onbasisoftherequirementsforfireseparationdistanceofLPGtankwithcorrespondingvolumeasspecifiedin4.4.1ofthiscode.4.3.8ThefireseparationdistancebetweentheLNGtank(tankfarm)ofLNGgasificationstationandtheoff-stationbuildingsshallnotbelessthanthosespecifiedinTable4.3.8andthefireseparationdistancefromotherbuildingsnotspecifiedinTable4.3.8shallmeettherequirementsofcurrentnationalstandard"CodeforDesignofCityGasEngineering"(GB50028).Table4.3.8FireSeparationDistancebetweenLNGTank(TankFarm)ofLNGGasificationStationandOff-stationBuildings(m)NameLNGtank(tankfarm)(totalvolumeV,m3)Thenatural34\nV≤10101,000Theresidentialarea,villageandsmalltown,andimportant45507090110130150publicbuildings(externalwalloftheoutermostbuilding)Industrialenterprises(external27303540506075walloftheoutermostbuilding)Openfireorsparkingsites,outdoorpowertransformation455055607080120anddistributionstationsOthercivilbuildings,ClassesAandBliquidtanks,CategoriesAandBstorages,CategoriesAandBfactorybuildingsandthe404550556575100stackyardsofthematerialssuchasstraw,commonreed,andpackedwastepaperClassCliquidtank,combustiblegastank,CategoriesCandDfactory32354045556580buildings,CategoriesCandDstoragesCombustion-supportinggastankandthestackyardof27303540506075materialssuchastimberClassesI18202225304050andIIOtherbuildingsClassIII22252730405060ClassIV27303540506075HighRoad(roadside)speed,202530ClassesI36\nLNGtank(tankfarm)(totalvolumeV,m3)Name3010m2Asforundergroundorsemi-undergroundcrowdedhalls,roomsandsinginganddancingentertainmentandshowvenues,therespectivetotalclearwidthoftheroomevacuationdoors,safetyexits,evacuationpassagewaysandevacuationstairsshallbe59\ndeterminedaccordingtothecalculationof1.00mforevery100evacuationpeople.3Thetotalclearwidthoftheexternaldoorsonthefirstfloorshallbedeterminedaccordingtothecalculationofthemaximumevacuationpeopleinthisbuilding;asfortheexternaldoornotforevacuationofpeoplefromotherfloors,thewidthmaybedeterminedaccordingtothecalculationofthenumberofevacuatedpersonsonthisfloor.4Thenumberofevacuatedpersonsinvideohallofsinginganddancingentertainmentandshowvenuesshallbecalculatedas1.0person/m2accordingtothebuildingareaofthehallsandrooms;andthenumberofevacuatedpersonsinsinginganddancingentertainmentandshowvenuesshallbecalculatedas0.5person/m2accordingtothebuildingareaofthehallsandrooms.5Asforthelocationswithfixedseats,thenumberofevacuatedpersonsmaybecalculatedaccordingto1.1timestheactualnumberofseats.6Thenumberofevacuatedpersonsinexhibitionhallshallbecalculatedaccordingtothebuildingareaandpeopledensityofexhibitionhall,andthepeopledensityinexhibitionhallshouldnotbelessthan0.75person/m2.7ThenumberofevacuatedpersonsinstoresshallbecalculatedaccordingtothebuildingareaofbusinesshalloneachfloormultipliedbythepeopledensityspecifiedinTable5.5.21-2.Thepeopledensityofbuildingmaterialstores,furnitureandlightfixtureexhibitionbuildingsmaybedeterminedaccordingto30%ofthespecifiedvaluesinTable5.5.21-2.Table5.5.21-2PeopleDensityinShopBusinessHall(person/m2)StoreySecondfloorFirstfloorFirstandsecondfloorsThirdfloorFourthfloororabovepositionundergroundundergroundovergroundovergroundovergroundPeople0.560.600.43~0.600.39~0.540.30~0.42density5.5.22Asforpubliccrowdedbuildings,metallicfencesshouldnotbearrangedatwindowandbalcony,etc.;wheretheymustbearrangedthere,theyshallbeabletobeopenedfrominside;suitableauxiliaryevacuationescapefacilitiesshallbesetatthewindowandbalconyaccordingtotheirheights.5.5.23Refugefloor(room)shallbearrangedinthepublicbuildingswiththebuildingheightgreaterthan100m.Therefugefloor(room)shallmeetthefollowingrequirements:1Theheightfromthefloorofthefirstrefugefloor(room)tothegroundofthefirefightingandrescuesiteshallnotbegreaterthan50mandtheheightbetweentworefugefloors(rooms)shouldnotbegreaterthan50m.2Theevacuationstairsleadingtorefugefloor(room)shallbeseparated,misalignedonthesamefloorordisconnectedontheupperandlowerfloors.3Thenetareaofrefugefloor(room)shallbeabletomeettherequirementsofthedesignednumberofrefugepeople,andshouldbecalculatedaccordingto5.0persons/m2.4Refugefloormayalsobeusedasmechanicalfloor.Theequipmentpipesshouldbeconcentrated,andtheinflammable,combustibleliquidorgaspipesshallbeconcentrated;theequipmentpipeareashallbeseparatedfromrefugeareabyadoptingthefirepartitionwallwithfireresistanceratingnotlessthan3.00h.Pipingshaftsandequipmentroomshallbeseparatedfromrefugeareabyadoptingthefirepartitionwall60\nwithfireresistanceratingnotlessthan2.00h;thedoorsofpipingshaftsandequipmentroomshallnotopentowardrefugeareadirectly;whenitisnecessarytodoso,thedistancetotheentrance/exitofrefugefloorshallnotbelessthan5m,andclassAfiredoorshallbeadopted.Flammable,combustibleliquidorgaspipesshallnotbearranged,andotheropeningsexceptwindowsandevacuationdoorsshallnotbesetinrefugeroom.5Fireelevatorexitsshallbearrangedonrefugefloor.6Firehydrantsandfirehosereelsshallbearranged.7Dedicatedtelephoneandemergencybroadcastingforfireprotectionshallbearranged.8Obviousindicationsignsshallbearrangedattheentrancefromrefugefloor(room)tostaircaseandattheexitfromevacuationstairstorefugefloor(room).9Windowswhichmaybeopenedoutwardsdirectlyorindependentmechanicalsmoke-prooffacilitiesshallbearranged,andClassBfirewindowshallbeadopted.5.5.24Asforhigh-riseinpatientbuildings,refugeroomsshallbearrangedontheinpatientbuildingfloorandatcleanoperatingdepartmentonthesecondfloorandaboveandshallmeetthefollowingrequirements:1Thenumberofcareunitsfortheserviceinrefugeroomshallnotexceed2andthenetareashallbedeterminedwitheachcareunitnotlessthan25.0m2.2Whererefugeroomisalsousedforotherpurposes,therefugesafetyofpeopleshallbeguaranteedandthenetareaforrefugeshallnotbereduced.3Refugeroomsshallbeclosetostaircaseandfirepartitionwithfireresistanceratingnotlessthan2.00handclassAfiredoorshallbeadoptedforseparatingfromotherparts.4Dedicatedtelephoneandemergencybroadcastingforfireprotectionshallbearranged.5Obviousindicationsignshallbearrangedattheentranceofrefugeroom.6Windowswhichmaybeopenedoutwardsdirectlyorindependentmechanicalsmoke-prooffacilitiesshallbearranged,andClassBfirewindowshallbeadopted.IIIResidentialbuildings5.5.25Thearrangementofsafetyexitofresidentialbuildingshallmeetthefollowingrequirements:1Asforthebuildingswithheightnotgreaterthan27m,wherethebuildingareaofanyfloorineachunitismorethan650m2orthedistancefromtheentrydoortothenearestsafetyexitismorethan15m,thesafetyexitnumberoneveryfloorofeachunitshallnotbelessthan2.2Asforthebuildingswithheightbetween27m~54m,wherethebuildingareaofanyfloorineachunitismorethan650m2orthedistancefromtheentrydoortothenearestsafetyexitismorethan10m,thesafetyexitnumberoneveryfloorofeachunitshallnotbelessthan2.3Asforthebuildingswithheightmorethan54m,thesafetyexitnumberoneveryfloorofeachunitshallnotbelessthan2.61\n5.5.26Asfortheresidentialbuildingswiththeheightbetween27m~54m,whereanevacuationstaircaseisarrangedforeachunit,theevacuationstaircaseshallleadtotheroof,theevacuationstaircasebetweenunitscanbeconnectedthroughroofsandClassBfiredoorshallbeadoptedastheentrydoor.Twosafetyexitsshallbearrangedwhereitcannotleadtotherooforcannotbeconnectedthroughroofs.5.5.27Thearrangementofevacuationstaircaseofresidentialbuildingshallmeetthefollowingrequirements:1Openstaircasemaybeadoptedfortheresidentialbuildingswithheightnotgreaterthan21m;enclosedstaircaseshallbeadoptedfortheevacuationstaircasearrangedadjacenttoelevatorshaft;whereClassBfiredoorisadoptedasentrydoor,openstaircasestillmaybeadopted.2Asfortheresidentialbuildingswithheightbetween21m~33m,theenclosedstaircaseshallbeadopted;whereClassBfiredoorisadoptedasentrydoor,openstaircasemaybeadopted.3Smoke-proofstaircaseshallbeadoptedforresidentialbuildingswithheightgreaterthan33m.Entrydoorshouldnotdirectlyopentowardfrontroom,whereitisinevitable,thenumberofentrydoorsopeningtowardthesamefrontroomoneachfloorshallnotbemorethan3,andClassBfiredoorshallbeadopted.5.5.28Wherethereisdifficultyforthedispersionarrangementofevacuationstaircasefortheresidentialunitandthedistancefromanyentrydoortotheentranceofthenearestescapestaircaseisnotgreaterthan10m,scissorstaircasemaybeadoptedandthefollowingrequirementsshallbemet:1Smoke-proofstaircaseshallbeadopted.2Firepartitionwallwithfireresistanceratingnotlessthan1.00hshallbearrangedbetweenthestairflights.3Thefrontroomofstaircaseshouldnotbeshared;whereitisshared,theutilizationareaofthefrontroomshallnotbelessthan6.0m2.4Thefrontroomofthestaircaseorthesharedfrontroomshouldnotbesharedbythefireelevator;ifthestaircaseandthefireelevatorsharethesamefrontroom,theutilizationareaofthesharedroomshallnotbelessthan12.0m2andthelengthoftheshortsideshallnotbelessthan2.4m.5.5.29Thesafetyevacuationdistanceoftheresidentialbuildingshallmeetthefollowingrequirements:1ThelineardistancefromtheentrydoordirectlyleadingtotheevacuationpassagewaytothenearestsafetyexitshallnotbegreaterthanthosespecifiedinTable5.5.29.Table5.5.29LinearDistancefromResidentialBuildingEntryDoorDirectlyLeadingtoEvacuationPassagewaytotheNearestSafetyExit(m)EntrydoorbetweentwosafetyexitsEntrydooratbothsidesofdeadendorendResidentialbuildingcategoryClassesIandIIClassIIIClassIVClassesIandIIClassIIIClassIVSingle-/multi-storey403525222015High-rise40--20--Notes:1Themaximumlineardistancefromtheentrydooropeningtowardopenverandatothenearestsafetyexitmaybe62\n5mlongerthanthosespecifiedinthetable.2Asforthelineardistancefromentrydoordirectlyleadingtoevacuationpassagewaytothenearestopenstaircase,itshallbe5mshorterthanthosespecifiedinthistablewhentheentrydoorlocatesbetweentwostaircases,anditshallbe2mshorterthanthosespecifiedinthistablewhentheentrydoorlocatesonbothsidesorterminalsofdeadend.3Whensprinklersystemisarrangedinallresidentialbuildings,thesafetyevacuationdistancemaybeincreasedby25%onthebasisofthosespecifiedinthistable.4Thedistancefromtheentrydoorofskipfloorapartmentbuildingtothenearestsafetyexitshallbecountedfromentrydoor;thedistanceofaflightofsmallstairmaybecalculatedas1.50timesofitshorizontalprojectionlength.2Thestaircaseshallleadtooutdoorsdirectlyonthefirstfloor;orexpandingenclosedstaircaseorfrontroomofsmoke-proofstaircaseshallbeadoptedonthefirstfloor.Wherethestoreynumberdoesnotexceed4,thedoorleadingdirectlytooutdoorsshallbearrangedattheplacenolessthan15mawayfromthestaircase.3ThelineardistancefromanypointintheroomtotheentrydoordirectlyleadingtoevacuationpassagewayshallnotbegreaterthanthemaximumlineardistancefromevacuationdooronbothsidesorterminalsofthedeadendtothenearestsafetyexitasspecifiedinTable5.5.29.Note:Asforduplexapartmentbuilding,thedistanceofindoorstairmaybecalculatedaccordingto1.50timesofthehorizontalprojectionlengthofthestairflight.5.5.30Thetotalclearwidthofentrydoor,safetyexit,evacuationpassagewayandevacuationstaircaseofresidentialbuildingshallbedeterminedthroughcalculation,theclearwidthofentrydoorandsafetyexitshallnotbelessthan0.90m,andtheclearwidthofevacuationpassageway,evacuationstaircaseandexteriorevacuationdooronfirstfloorshallnotbelessthan1.10m.Asfortheevacuationstaircasewithonesidearrangedwithhandrailinresidentialbuildingwiththeheightnotgreaterthan18m,theclearwidthshallnotbelessthan1.0m.5.5.31Refugefloorshallbearrangedintheresidentialbuildingwithheightgreaterthan100m;thearrangementofrefugefloorshallmeettherequirementsofrefugefloorspecifiedin5.5.23ofthiscode.5.5.32Asforresidentialbuildingwithheightgreaterthan54m,oneroomofeachhouseholdshallmeetthefollowingrequirements:1Itshallbearrangednexttotheexteriorwallandarrangedwithopenableexteriorwindow;2Thefireresistanceratingofinteriorandexteriorwallbodiesshallnotbelessthan1.00h;ClassBfiredoorshouldbeadoptedasthedoorofthisroom;thefireintegrityofexteriorwindowshouldnotbelessthan1.00h.63\n6BuildingConstruction6.1FireWall6.1.1Firewallshallbeconstructeddirectlyontothefoundationortheload-bearingstructuresliketheframeandbeam;thefireresistanceratingofload-bearingstructuresliketheframeandbeamshallnotbelessthanthatofthefirewall.Thefirewallshallbepartedfromfloorbasetothebottombaseofbeam,floorslaborroofslab.Wherethefireresistanceratingoftheload-bearingstructureofhigh-risefactorybuilding(storage)androofslabislessthan1.00h,andthefireresistanceratingoftheload-bearingstructureandroofslabofotherbuildingroofislessthan0.50h,thefirewallshallbemorethan0.5mtallerthantheroof.6.1.2Wherethehorizontaldistancefromthecenterlineoffirewallcrosssectiontotheend-surfaceofskylightislessthan4.0m,andtheend-surfaceofskylightiscombustiblewallbody,measuresshallbetakentopreventthefirefromspreading.6.1.3Wheretheexteriorwallofbuildingisadifficult-combustibleorcombustiblewallbody,thefirewallshallprotrudetheexteriorsurfaceofwallbymorethan0.4m;theexteriorwallsonbothsidesoffirewallshallbenon-combustiblewallbodies,thewidthofwhichshallnotbelessthan2.0manditsfireresistanceratingshallnotbelessthanthatoftheexteriorwall.Incasetheexteriorwallofthebuildingisnon-combustiblewallbody,firewallmaynotprotrudetheexteriorsurfaceofwall,andthehorizontaldistancebetweentheclosestedgesofdoor,windoworopeningonbothsidesoffirewallshallnotbelessthan2.0m;whenmeasuressuchasarrangingClassBfirewindowpreventingfirehorizontallyspreadingareadopted,suchdistanceisnotlimited.6.1.4Thefirewallinabuildingshouldnotbearrangedatthecorner,whereitisinevitable,thehorizontaldistancebetweentheclosestedgesofdoor,windoworopeningonthewallsonbothsidesofinteriorangleshallnotbelessthan4.0m;wheremeasuressuchasarrangingClassBfirewindowpreventingfirehorizontallyspreadingisadopted,suchdistanceisnotlimited.6.1.5Door,windoworopeningshallnotbearrangedonthefirewall;whereitisinevitable,ClassAfiredoorandwindowunabletoopenorself-closingincaseoffireshallbearranged.PipesconveyingcombustiblegasandClassA,B,Cliquidsarestrictlyprohibitedfrompenetratingthefirewall.Exhaustductshallnotbearrangedinsidethefirewall.6.1.6Pipes,besidesthosespecifiedin6.1.5ofthiscode,shouldnotpenetratethefirewall;whereitisinevitable,thefirestopmaterialsshallbeadoptedtofillthegapsbetweenwallandpipestightly;non-combustiblematerialshallbeadoptedastheinsulationmaterialforpipespenetratingfirewall;wherethepipesareofdifficult-combustibleorcombustiblematerial,firepreventionmeasuresshallbeadoptedforpipesonbothsidesoffirewall.6.1.7Thestructureoffirewallshallbeabletokeepitstandingstilleventherooftruss,beamorfloorslabatitseithersideisdamagedincaseoffire.64\n6.2BuildingElementsandPipeShafts6.2.1Thepartitionwallbetweenthestageandtheaudiencehallofthebuildingliketheatreshallbefirepartitionwallwiththefireresistanceratingnotlessthan3.00h.Firepartitionwallwithfireresistanceratingnotlessthan1.50hmaybeadoptedasthepartitionwallbetweenupperpartofstageandblindceilingofaudiencehall,andClassBfiredoorshallbeadoptedonthepartitionwall.Thelightcontrolroomandcombustiblematerialstoreroominthelowerpartofstageshallbeseparatedfromotherpartswithfirepartitionwallwiththefireresistanceratingnotlessthan2.00h.Filmprojectionroomandrewindingroomshallbeseparatedfromotherpartswithfirepartitionwallwiththefireresistanceratingnotlessthan1.50h.Theobservationholeandprojectionholeshallbeadoptedwithfireseparationmeasures.6.2.2Operatingroomoroperatingdepartment,deliveryroom,intensivecareunit,roomforpreciseandpreciousmedicalequipment,storeroom,laboratoryandfilmroominthemedicalbuildings,childrenactivityplacessuchasthenursery,childrenroomofkindergartenandtheentertainmenthallinthebuildingsaswellasthesenioractivityplaceshallbeseparatedfromothersitesorlocationswithfirepartitionwallandfloorslabwithfireresistanceratingsnotlessthan2.00hand1.00hrespectively;ThedoorsandwindowsnecessaryonthewallshallbeClassBfiredoorsandwindows.6.2.3Thepartitionwallwiththefireresistanceratingnotlessthan2.00hshallbeadoptedtoseparatethefollowinglocationsfromotherparts;ClassBfiredoorsandwindowsshallbeadoptedasthedoorsandwindowsonthewall,whereitisdifficult,firerollershuttermaybeadopted,butitshallmeetthosespecifiedin6.5.3ofthiscode.1CategoriesAandBproductionpartsandpartsusingCategoryCliquidinthebuilding;2Locationswithopenflameandhightemperatureinthefactorybuildings;3RoomsofdifferentfirehazardtypesarrangedinCategoriesA,BandCfactorybuildings(storages);4Auxiliarystoreroomsinthecivilbuilding;auxiliaryroomsatthebackstageoftheatre;5Besidesthekitcheninresidentialbuilding,thecommonkitchenindormitoryorapartmentbuildingandthekitcheninotherbuilding;6Mobilegaragearrangedinresidentialbuilding.6.2.4Firewallinbuildingshallbeseparatedfromthefloorbasetothebottombaseofbeam,floorslaborroofslab.Theresidentialbuildingseparatingwallandthewallsbetweenunitsshallbeseparatedtothebottombaseofbeam,floorslaborroofslab;thefireresistanceratingoftheroofslabshallnotbelessthan0.50h.6.2.5Unlessotherwisestatedinthiscode,solidwallwiththeheightnotlessthan1.2morfireresistingoverhangingeavewithwidthnotlessthan1.0mandlengthnotlessthanthewidthofopeningshallbearrangedbetweenopeningsofupperandlowerstoreysofexteriorwallofthebuilding;wheresprinklersystemisarrangedintheroom,theheightofsolidwallbetweenopeningsofupperandlowerstoreysshallnotbelessthan0.8m.Ifitisdifficulttoarrangesolidwallbetweenopeningsofupperandlowerstoreys,65\nfireproofglasswallmaybearranged;thefireintegrityoffireproofglasswallofhigh-risebuildingshallnotbelessthan1.00h,andthefireintegrityoffireproofglasswallofmulti-storeybuildingsshallnotbelessthan0.50h.Thefireintegrityofexteriorwindowshallnotbelessthantherequirementsoffireintegrityoffireproofglasswall.Thewidthofwallbodybetweenopeningsofadjacenthouseholdsontheexteriorwallofresidentialbuildingshallnotbelessthan1.0m;ifthewidthislessthan1.0m,clapboardprotrudingtheexteriorwallbynotlessthan0.6mshallbearrangedbetweenopenings.Fireresistanceratingsandcombustionperformancesofsolidwall,fireresistingoverhangingeaveandclapboardshallnotbeinferiortotherequirementsofthebuildingexteriorwallwithcorrespondingfireresistancerating.6.2.6Asforbuildingcurtainwall,firepreventionmeasuresmeetingthosespecifiedin6.2.5inthiscodeshallbeadoptedatthefloorslabouteredgeoneachstorey;thegapbetweencurtainwallandfloorslaboneachstoreyshallbeblockedbyfirestopmaterials.6.2.7Thefirecontrolroom,extinguishingequipmentroom,firepumproomandmachineroomforairconditioningaswellaspowertransformationanddistributionroomarrangedinbuildingshallbeseparatedfromotherpartswiththepartitionwallandfloorslabwithfireresistanceratingsnotlessthan2.00hand1.50hrespectively.TheventilationroomarrangedinCategoriesDandEfactorybuildingsshallbeseparatedfromotherpartswithfirepartitionwallandfloorslabwithfireresistanceratingsnotlessthan1.00hand0.50hrespectively.ClassAfiredoorsshallbeadoptedasthedoorsofventilatingandairconditioningmachineroomaswellaspowertransformationanddistributionroomopeninginwardthebuilding;ClassBfiredoorshallbeadoptedasthedoorsoffirecontrolroomandotherequipmentroomopeninginwardthebuilding.6.2.8Iffoamplasticandothercombustiblesareadoptedasthethermalinsulationlayerinwallbodyofrefrigerationstoragesandlowtemperatureproductionlocations,non-combustiblethermalinsulatingmaterialsshouldbeappliedateachfloorslabforhorizontalfireseparation.Thefireresistanceratingoffireseparationpositionshallnotbeinferiortothatofthefloorslab.Thecombustiblethermalinsulationlayerongarretfloorandwallbodyofrefrigerationstoragesshouldbeseparatedbynon-combustiblewallbody.Iffoamplasticandothersareadoptedastheinternalthermalinsulationlayerofrefrigerationstoragesandlowtemperatureproductionlocations,thecombustionperformanceofthermalinsulationlayershallnotbelessthanClassB1andthesurfaceofthermalinsulationlayershallbeprotectedwithnon-combustiblematerials.Whenthestoreroomandprocessingworkshopofrefrigerationstoragearebuiltadjacenttoeachother,theyshallbeseparatedbyfirewalls.Ifitisnecessarytosetanopeningtoconnectthem,measuressuchasfirelobbyshallbetakentoseparatethem,anddoorsonbothsidesofthelobbyshallbeClassAfiredoors.Whenammoniacompressorroomisadjacenttoprocessingworkshop,theyshallbeseparatedbysuchfirewallswithoutanydoororwindow.6.2.9Theverticalshaftssuchaselevatorshaftinbuildingshallmeetthefollowingrequirements:1Elevatorshaftshallbeconstructedindependently.NopipesforcombustiblegasesandCategoriesA,B,andCliquidsandnocablesorwiresirrelevanttotheelevator66\nshallbepermittedinelevatorshaft.Exceptelevatordoor,safetyemergencyexitandventhole,nootheropeningshallbearrangedonthewallofelevatorshaft.2Suchverticalshaftwayascableshaft,pipeshaft,dischargeflue,exhaustductandrefusechannelshallbearrangedindependently.Thefireresistanceratingofshaftwallshallnotbelessthan1.00h;theClassCfiredoorshallbeadoptedastheinspectiondoorintheshaftwall.3Cableshaftsorpipeshaftswithinthebuildingshallbeblockedatthejointoffloorslaboneachlayerwithnon-combustiblematerialorfirestopmaterialwiththefireresistanceratingnotinferiortothatofthefloorslab.Openingsthatconnectthecableshaftorpipeshaftwithroomsorcorridorsinbuildingshallbeblockedwithfirestopmaterials.4Refusechannelinbuildingshouldbearrangedagainsttheexteriorwall;theexhaustoutletofrefusechannelshallopendirectlytooutdoor;refusehoppershallbemadeofnon-combustiblematerialandcapableofautomaticallyclosing.5Thefireresistanceratingofelevatorlandingdoorshallnotbelessthan1.00handshallcomplywiththerequirementsofcompletenessandinsulationspecifiedinthecurrentnationalstandard"FireResistanceTestforLiftLandingDoors-MethodsofMeasuringIntegrity,ThermalInsulationandHeatFlux"(GB/T27903).6.2.10Outdoorelectroluminescencebillboardshallnotbedirectlyarrangedonthewallwithcombustibleordifficult-combustiblematerials.Thearrangementofoutdoorbillboardshallnotsheltertheexteriorwindowofbuildingandshallnotinfluencetheoutdoorfire-fightingandrescueaction.6.3Roof,BlindCeilingandJoints6.3.1WherecombustiblematerialisadoptedfortheinsulationlayerofblindceilingofbuildingswithClassIIIorIVfireresistancerating,greytileshallnotbeadoptedfortheroof.Non-combustiblematerialshallbeadoptedastheinsulationlayerusedwithintherangeof0.5maroundthenonmetallicchimneyor0.7maroundthemetalchimneyintheblindceiling.6.3.2AsforblindceilinginthebuildingofClassIIIfireresistancewithmorethan2storeys,dormerwindowshallbearrangedwithintherangeofeveryfirepartition,andthespacingofdormerwindowsshouldnotbegreaterthan50m.6.3.3Asforblindceilingcontainingcombustiblematerial,blindceilingentrancewiththeclearwidthandclearheightnotlessthan0.7mshallbearrangedwithintherangeofeachfirepartition;asforpublicbuilding,thenumberoftheblindceilingentranceswithintherangeofeachfirepartitionshouldnotbelessthan2.Theentranceoftheblindceilingshouldbeinthecorridorclosetothestaircase.6.3.4Non-combustiblematerialshallbeadoptedforthefillingmaterialofdeformationjointandtheconstructionbaseofdeformationjoint.Theelectricalwire,cableandpipesforcombustiblegasandClassA,B,Cliquidsshouldnotpenetratethedeformationjointinbuilding,whereitisinevitable,sleevemadeofnon-combustiblematerialshallbearrangedattheplacewherethedeformationjointispenetratedorothermeasuresavoidingdeformationshallbeadopted,andfirestopmaterials67\nshallbeadoptedforblocking.6.3.5Firestopmaterialsshallbeadoptedtoblockthejointswherepipesinsmokecontrol,smokeexhaustandheating,ventilatingandairconditioningsystemandotherpipesinbuildingpenetratethefirepartitionwall,floorslaborfirewall.Wheretheairpipepenetratesthefirepartitionwall,floorslabandfirewall,theairpipewithintherangeof2.0mtoeachsidesoffirevalveorsmokefirevalveonairpipeatpenetratingpartshallbefireproofairpipeortheairpipeouterwallshallbetakenwithfireprotectionmeasures,andthefireresistanceratingshallnotbeinferiortothatofthefirepartition.6.3.6Asforpipesinthebuildingpronetodeformingunderhightemperatureandflame,fireretardantmeasuresshouldbetakenatthepenetratingpositionoffloorslabandonbothsidesofpenetratedfirepartitionwall.6.3.7Measurespreventingfirespreadingshallbetakenbetweenopeningonbuildingroofandadjacentbuildingorfacility.6.4EvacuationStaircasesandStairs6.4.1Evacuationstaircaseshallmeetthefollowingrequirements:1Naturallightingandventilationshallbeavailableforthestaircasewhichshouldbearrangedagainsttheexteriorwall.Ifitisarrangedagainsttheexteriorwall,thehorizontaldistancefromthewindowsonexteriorwallsofstaircase,frontroomandsharedfrontroomtothenearestedgesofdoor,windoworopeningonbothsidesshallnotbelessthan1.0m.2Waterboilingroom,combustiblematerialstorageroomorrefusechannelshallnotbearrangedinthestaircase.3Thereshallbenoprotrusionsorotherobstaclesthathinderevacuationinthestaircase.4Theenclosedstaircase,smoke-proofstaircaseanditsfrontroomshallnotbearrangedwithrollershutter.5CategoryA,BorCliquidpipeshallnotbearrangedinthestaircase.6Combustiblegaspipesareforbiddentopenetrateorbearrangedinenclosedstaircase,smoke-proofstaircaseanditsfrontroom.Combustiblegaspipesshallnotbearrangedintheopenstaircase;whereitisnecessarytoarrangecombustiblegaspipesandcombustiblegasmetersintheopenstaircaseofresidentialbuilding,metallicpipeshallbeadoptedandvalvecuttingoffthegassourceshallbearranged.6.4.2Theenclosedstaircaseshallnotonlymeettherequirementsof6.4.1ofthiscode,butalsomeetthefollowingrequirements:1Wherethenaturalventilationisunavailableorthenaturalventilationfailstomeettherequirements,mechanicalpressurizedairsupplysystemshallbearrangedorsmoke-proofstaircaseshallbeadopted.2Exceptforexit,entranceorexteriorwindowinstaircase,otherdoor,windoworopeningshallnotbearrangedonthewallofstaircase.3Asforthehigh-risebuildings,crowdedpublicareasandcrowdedmulti-storeyCategoryCfactorybuildingandCategoriesAandBfactorybuildings,thedooroftheenclosedstaircaseshallbeClassBfiredoorandshallopentotheevacuationdirection;68\ntwo-wayswingdoormaybeadoptedforotherbuildings.4Asforfirstfloorofstaircase,passagewayandhallwaymaybecontainedinthestaircasetoformanenlargedenclosedstaircase,andClassBfiredoorshallbeadoptedtoseparateitfromotherpassagewaysandrooms.6.4.3Smoke-proofstaircaseshallnotonlymeettherequirementsof6.4.1ofthiscode,butalsomeetthefollowingrequirements:1Smoke-prooffacilitiesshallbearranged.2Thefrontroommaybesharedbythefireelevatorroom.3Utilizationareaoffrontroom:forpublicbuildingandhigh-risefactorybuilding(storage),theareashallnotbelessthan6.0m2;forresidentialbuilding,theareashallnotbelessthan4.5m2.Wherethefrontroomissharedbythefireelevatorroom,theutilizationareaofsharedfrontroom:shallnotbelessthan10.0m2forpublicbuildingandhigh-risefactorybuilding(storage);andshallnotbelessthan6.0m2forresidentialbuilding.4ClassBfiredoorsshallbeadoptedasthedoorsleadingfromevacuationpassagewaytofrontroomandfromfrontroomtothestaircase;5Exceptforthestaircasefrontroomofresidentialbuilding,nodoor,windoworopeningotherthanevacuationdoorandairinletshallbearrangedonthewallinsmoke-proofstaircaseandfrontroom.6Asforfirstfloorofstaircase,thepassagewayandhallwaymaybecontainedinthestaircasefrontroomtoformanenlargedfrontroom,buttheyshallbeseparatedfromotherpassagewayandroomwithClassBfiredoor.6.4.4Exceptformalposedevacuationstairsleadingtorefugefloor,theplanepositionofevacuationstaircaseoneveryfloorinthebuildingshallnotbechanged.Exceptfortheself-usestairsintheresidentialbuildings,theevacuationstaircaseinundergroundorsemi-undergroundbuildings(basement)shallmeetthefollowingrequirements:1Asfortheundergroundorsemi-undergroundbuilding(basement)withheightdifferencebetweentheindoorandoutdoorexitandentrancegroundmorethan10morwith3ormorestoreys,smoke-proofstaircaseshallbeadoptedastheevacuationstair;enclosedstaircaseshallbeadoptedastheevacuationstairofotherundergroundorsemi-undergroundbuilding(basement).2Itshallbeseparatedfromotherpartsonfirstfloorwithfirepartitionwallwithfireresistanceratingnotlessthan2.00handshalldirectlyleadtooutdoors;whereitisnecessarytoarrangedooronthepartitionwall,ClassBfiredoorshallbeadopted.3Theundergroundorsemi-undergroundpartsandovergroundpartsofthebuildingshallnotsharestaircase,whereitisinevitable,firepartitionwallwithfireresistanceratingnotlessthan2.00handClassBfiredoorshallbeadoptedtocompletelyseparatetheconnectionsbetweentheundergroundorsemi-undergroundpartsandtheovergroundpartsonthefirstfloor,andvisiblesignsshallbearranged.6.4.5Theoutdoorevacuationstairshallmeetthefollowingrequirements:1Thehandrailheightshallnotbelessthan1.10m;theclearwidthofstairshallnotbelessthan0.90m.2Theinclinationangleshallnotbegreaterthan45°.69\n3Stairflightandlandingshallbemadeofnon-combustiblematerial.Thefireresistanceratingoflandingshallnotbelessthan1.00h,andthefireresistanceratingofstairflightshallnotbelessthan0.25h.4ClassBfiredoorshallbeadoptedasthedoorleadingtoexteriorstair,andthedoorshallopenoutward.5Exceptforevacuationdoor,door,windoworopeningshallnotbearrangedonthewallsurfacewithin2maroundthestair.Theevacuationdoorshallnotbeoveragainstthestairflight.6.4.6MetalstairmaybeusedasthesecondsafetyexitinCategoriesDandEfactorybuildings,butitsclearwidthshallnotbelessthan0.90manditsinclinationangleshallnotbegreaterthan45°.AsforCategoriesDandEhigh-risefactorybuildings,wherethenumberofpersonnelontheoperatingplatformofeachstoreyislessthanorequalto2andthenumberofpersonneloperatingsimultaneouslyontheoperatingplatformsofallstoreysislessthanorequalto10intotal,openstairmaybeusedasevacuationstair,ormetalstairwithclearwidthnotlessthan0.90mandinclinationanglenotgreaterthan60°maybeadopted.6.4.7Spiralstairandwheelstepshouldnotbeadoptedasthestairusedforevacuationorthestaironevacuationpassageway,whereitisinevitable,theplaneangleformedbytheupperandlowerstagesofthestepshallnotbegreaterthan10°,andthedepthofstep250mmawayfromhandrailoneachstageshallnotbelessthan220mm.6.4.8Asforpublicevacuationstairinbuildings,thehorizontalclearspacingbetweentwostairflightsandhandrailsshouldnotbelessthan150mm.6.4.9Over10mhighbuildingswithClassIIIfireresistanceshallbearrangedwithexternalfireladderleadingtotheroof.Theexternalfireladdershallnotbeoppositetothedormerwindow,itswidthshallnotbelessthan0.6manditshouldbearranged3.0mhighfromtheground.6.4.10Normally-openClassAfiredoorshallbearrangedatthefirecompartmentofevacuationpassageway.6.4.11Theevacuationdoorinbuildingshallmeetthefollowingrequirements:1Asforevacuationdoorofcivilbuildingandfactorybuilding,side-hungdooropeningtowardevacuationdirectionshallbeadopted,andslidingdoor,rollingdoor,flapdoor,swingdoororfoldingdoorshallnotbeadopted.ExceptforCategoriesAandBmanufacturingworkshops,asforroomswiththenumberofpeoplenotexceeding60andtheaveragenumberofevacuatedpersonsofeachdoornotexceeding30,theopeningdirectionofevacuationdoorshallbenotlimited.2Side-hungdooropeningtowardtheevacuationdirectionshallbeadoptedasevacuationdoorofstorages;slidingdoororrollingdoormaybeadoptedattheoutersideclosetothewallofCategoriesC,DandEstoragesonthefirstfloor.3Wherethedooropeningtowardtheevacuationstairorstaircaseopenscompletely,theeffectivewidthofstairlandingshallnotbereduced.4Asfortheevacuationdoorincrowdedplacesnecessaryforcontrollingpersonnelaccessatwillatordinarytimesandexteriordoorofresidentialbuilding,dormitoryorapartmentbuildingarrangedwithaccesscontrolsystem,theyshallbeeasilyopenedfrominsidewithoutkeyoranyothertoolincaseoffire,andthereshallbe70\nidentificationforusagenoticeatvisibleposition.6.4.12Theoutdooropenspace(likesunksquare)forfireseparationshallmeetthefollowingrequirements:1Thehorizontaldistancebetweentheclosestedgesofdifferentzoneopeningsleadingtooutdooropenspace(likesunksquare)afterseparationshallnotbelessthan13m.Exceptforpersonnelevacuation,theoutdooropenspaceshallnotbeusedforothercommercialpurposesorpurposeswhichmayresultinfirespreading.Thenetareaforevacuationshallnotbelessthan169m2.2Atleastoneevacuationstairdirectlyleadingtogroundshallbearrangedintheoutdooropenspace(likesunksquare).Wherethefirecompartmentconnectingtothesunksquareneedtouseitforevacuation,thetotalclearwidthofevacuationstairshallnotbelessthanthetotaldesignclearwidthforevacuationfromanyfirecompartmenttotheoutdooropenspace.3Whereitisnecessarytoarrangewindandrainshed,thewindandrainshedshallnotbecompletelyclosed,andtheopeningpartsaroundshallbearrangeduniformly.Theareaofsuchopeningsshallnotbelessthan25%ofthegroundareaoftheoutdooropenspaceandtheopeningheightshallnotbelessthan1.0m.Iflouverisarrangedforsuchopenings,theeffectivesmokeexhaustareaoflouvermaybecalculatedby60%oftheairventareaofthelouver.6.4.13Thearrangementoffirelobbyshallmeetthefollowingrequirements:1Thebuildingareaoffirelobbyshallnotbelessthan6.0m2.2ClassAfiredoorshallbeadoptedasthedooroffirelobby.3Thedoors,indifferentfirecompartments,leadingtothefirelobbyshallnotbecountedassafetyexit;theminimumspacingbetweendoorsshallnotbelessthan4m.4TheinternaldecorationmaterialoffirelobbyshallreachClassAcombustionperformance.5Thefirelobbyshallnotbeusedforpurposesotherthanforpersonnelaccess.6.4.14Thearrangementofexitpassagewayshallmeetthefollowingrequirements:1Thefireresistanceratingofexitpassagewayfirepartitionwallshallnotbelessthan3.00h;thefireresistanceratingoffloorslabshallnotbelessthan1.50h.2Thenumberofexitpassagewaydirectlyleadingtogroundshallnotbelessthan2,andsuchexitsshallbearrangedindifferentdirections;wheretheexitpassagewayisonlyconnectedwithonefirecompartmentwhichpossessesatleastonesafetyexitdirectlyleadingtooutdoor,oneexitdirectlyleadingtogroundmaybearranged;thedistancebetweenthedoorofanyfirecompartmentleadingtoexitpassagewayandexitdirectlyleadingtogroundnearesttotheexitpassagewayshallnotbegreaterthan60m.3Theclearwidthofexitpassagewayshallnotbelessthanthatofthetotaldesignclearwidthforevacuationfromanyfirecompartmenttothepassageway.4TheinternaldecorationmaterialofexitpassagewayshallreachClassAcombustionperformance.5Smoke-prooffrontroomshallbearrangedbetweenfirecompartmentandexitpassagewayentrance.Theutilizationareaoffrontroomshallnotbelessthan6.0m2;ClassAfiredoorshallbeadoptedasthedooropeningtowardthefrontroomwhileClassBfiredoorshallbeadoptedasthedooroffrontroomopeningtowardtheexitpassageway.71\n6Firehydrant,fireemergencylighting,emergencybroadcastandfiredepartmenthotlineshallbearrangedintheexitpassageway.6.5FireDoor,WindowandFireRollerShutter6.5.1Thearrangementoffiredoorshallmeetthefollowingrequirements:1Normally-openfiredoorshouldbeadoptedasthefiredoorarrangedatfrequentaccessinabuilding.Thenormally-openfiredoorshallbeabletocloseautomaticallyincaseoffireandshallhavethefunctionofsignalfeedback.2Exceptthepositionwherenormally-openfiredoorcanbearranged,normally-closedfiredoorshallbeadoptedasfiredooratotherpositions.Thenormally-closedfiredoorshallbeprovidedwithawarningsigninvisibleposition,suchas"KeepClosed".3Exceptaccessdoorofpipeshaftanddoorofresidentialbuilding,thefiredoorshallhavethefunctionofautomaticclosing.Thebi-partingfiredoorshallhavethefunctionofautomaticclosinginsequence.4BesidesthosespecifiedinItem4of6.4.11inthiscode,thefiredoorshallbeabletoopenmanuallyonbothinnerandoutersides.5Nearthebuildingdeformationjoint,thefiredoorshallbearrangedatthesidewithmorestoreysandshallguaranteethatnodeformationjointiscrossedbythedoorleafwheresuchdoorisopen.6Thefiredoorshallhavesmoke-proofperformanceunderclosedconditions.7ClassesA,BandCfiredoorsshallmeettherequirementsofthecurrentnationalstandard"FireResistantDoorsets"(GB12955).6.5.2Thefirewindowsarrangedonfirewallandfirepartitionwallshallbenon-openableorhavethefunctionofautomaticclosingincaseoffire.Thefirewindowshallmeettherequirementsofthecurrentnationalstandard"FireResistantWindows"(GB16809).6.5.3Wherefirerollershutterisarrangedatfireseparationposition,itshallmeetthefollowingrequirements:1Exceptatrium,whenthewidthofthefireseparationpositionisnotgreaterthan30m,thewidthoffirerollershuttershallnotbegreaterthan10m;whenthewidthofthefireseparationpositionisgreaterthan30m,thewidthoffirerollershuttershallnotbegreaterthan1/3ofwidthofsuchpositionandshallnotbegreaterthan20m.2Thefirerollershuttershallhavethefunctionofautomaticclosingunderdeadweightincaseoffire.3Unlessotherwisestatedinthiscode,thefireresistanceratingoffirerollershuttershallnotbelessthanthatrequiredforthewallarrangedatcorrespondingpositioninthiscode.Wherethefireresistanceratingoffirerollershuttermeetstherelevantjudgmentrequirementsforfireintegrityandfireinsulationinthecurrentnationalstandard"FireResistanceTests-DoorandShutterAssemblies"(GB/T7633),sprinklersystemmaynotbearranged.Wherethefireresistanceratingoffirerollershutteronlymeetstherelevantjudgmentrequirementsforfireintegrityinthecurrentnationalstandard"FireResistanceTests-Door72\nandShutterAssemblies"(GB/T7633),sprinklersystemshallbearranged.Thedesignofsprinklersystemshallmeettherequirementsofthecurrentnationalstandard"CodeofDesignforSprinklerSystems"(GB50084),butitsfiredurationshallnotbelessthanthefireresistanceratingoffirerollershutter.4Thefirerollershuttershallbesmoke-proof,andthefirestopmaterialshallbeadoptedtoblockthegapbetweenfirerollershutterandfloorslab,beam,wallandcolumn.5Thefirerollershutterwhichneedslandautomaticallyincaseoffireshallhavethefunctionofsignalfeedback.6Otherrequirementsshallmeettherequirementsofthecurrentnationalstandard"FireResistantShutter"(GB14102).6.6Overpass,TrestleandPipeTrench6.6.1Non-combustiblematerialsshallbeadoptedforoverpass,trestlecrossingbuildingsaswellastrestleforconveyingcombustiblematerial,combustiblegasandClassA,B,Cliquids.6.6.2Thetrestleforconveyingmaterialwithfireandexplosiveriskshallnotbeusedasevacuationrouteatthesametime.6.6.3Measuresforpreventingfirespreadingshouldbetakenforenclosedoverpass,dooropeningatthejointoftrestleandbuildingaswellasenclosedpipetrench(gallery)forlayingClassA,B,Cliquidpipes.6.6.4Measuresshallbetakenforoverpassandvestibuleconnectingtwobuildingstopreventfirespreadingbetweentwobuildings.Whennon-combustiblematerialsareadoptedforoverpassandvestibuleonlyusedfortransit,andthebuildingexitsleadingtothemmeettherequirementsofsafetyexit,suchexitsmaybeusedassafetyexits.6.7BuildingInsulationandExteriorWallFinishSystem6.7.1Asfortheinteriorandexteriorinsulationsystemofbuildings,ClassAinsulationmaterialsshouldbeadopted,ClassB2shouldnotbeadopted,andClassB3mustnotbeadopted;thefireresistanceratingofbasewallorroofslabsetwithinsulationsystemshallmeettherelevantrequirementsofthiscode.6.7.2Wheninteriorinsulationsystemisadoptedfortheexteriorwall,itshallmeetthefollowingrequirements:1ClassAinsulationmaterialshallbeadoptedforcrowdedlocations,locationswithfirehazardduetotheapplicationoffire,fueloilandgas,aswellassuchlocationsorpositionsasevacuationstaircase,exitpassageway,refugeroomandrefugefloorinvariousbuildings;2Low-smokeandlow-toxicinsulationmaterialwithcombustionperformancenotlessthanClassB1shallbeadoptedforotherlocations;3Non-combustiblematerialshallbeadoptedfortheprotectivelayerofinsulationsystem.WhenClassB1insulationmaterialisadopted,theprotectivelayershallnotbelessthan10mmthick.6.7.3Wheninsulationmaterialandcompositeinsulationstructuralbodywithoutcavityinwallonbothsidesareadoptedfortheexteriorwall,thefireresistanceratingofsuch73\ncompositestructuralbodyshallmeettherelevantrequirementsofthiscode;whenClassesB1andB2insulationmaterialsareadopted,non-combustiblematerialshallbeadoptedforthewallonbothsidesofinsulationmaterialanditsthicknessshallnotbelessthan50mm.6.7.4Asforbuildingsarrangedwithcrowdedlocation,theexternalinsulationmaterialofexteriorwallshallreachClassAcombustionperformance.6.7.5Whenthereisnocavitybetweentheexternalinsulationsystemofexteriorwallandthebasewallanddecorationlayer,theinsulationmaterialshallmeetthefollowingrequirements:1Residentialbuilding:1)Whenthebuildingheightisgreaterthan100m,theinsulationmaterialshallreachClassAcombustionperformance;2)Whenthebuildingheightisbetween27~100m,theinsulationmaterialshallreachatleastClassB1combustionperformance;3)Whenthebuildingheightisnotgreaterthan27m,theinsulationmaterialshallreachatleastClassB2combustionperformance.2Asforotherbuildingsexceptfortheresidentialbuildingsandbuildingsarrangedwithcrowdedlocations:1)Whenthebuildingheightisgreaterthan50m,theinsulationmaterialshallreachClassAcombustionperformance;2)Whenthebuildingheightisbetween24m~50m,theinsulationmaterialshallreachatleastClassB1combustionperformance;3)Whenthebuildingheightisnotgreaterthan24m,theinsulationmaterialshallreachatleastClassB2combustionperformance.6.7.6Exceptforthebuildingsarrangedwithcrowdedlocations,whenthereisnocavitybetweentheexternalinsulationsystemofexteriorwallandthebasewallanddecorationlayer,theinsulationmaterialshallmeetthefollowingrequirements:1Whenthebuildingheightisgreaterthan24m,theinsulationmaterialshallreachClassAcombustionperformance;2Whenthebuildingheightisnotgreaterthan24m,theinsulationmaterialshallreachatleastClassB1combustionperformance.6.7.7Besidestheconditionsspecifiedin6.7.3ofthiscode,whentheexternalinsulationsystemofexteriorwalladoptsClassB1orB2insulationmaterialaccordingtotherequirementsofthissection,itshallmeetthefollowingrequirements:1ExceptthepublicbuildingadoptsClassB1insulationmaterialandwithbuildingheightnotgreaterthan24morresidentialbuildingadoptsClassB1insulationmaterialandwithbuildingheightnotgreaterthan27m,thefireintegrityofdoorsandwindowsontheexteriorwallshallnotbelessthan0.50h.2Horizontalfireisolationbeltshallbearrangedoneachlayerofinsulationsystem.ThefireisolationbeltshalladoptClassAmaterialanditsheightshallnotbelessthan300mm.6.7.8Whennon-combustiblematerialisadoptedfortheprotectivelayeronsurfaceoftheexternalinsulationsystemofexteriorwall,theprotectivelayershallcladtheinsulationmaterialcompletely.Exceptfortheconditionsspecifiedin6.7.3ofthiscode,whenClassB1andB2insulationmaterialsareadoptedaccordingtothissection,thethicknessofthefirst74\nlayerofprotectivelayershallnotbelessthan15mmandthatofotherlayersshallnotbelessthan5mm.6.7.9Whenthereiscavitybetweentheexternalinsulationsystemofexteriorwallandthebasewallanddecorationlayer,firestopmaterialshallbeadoptedatthefloorslabofeachstoreytoblockit.6.7.10Asfortheexternalinsulationsystemofbuildingroof,whenthefireresistanceratingofroofslabisnotlessthan1.00h,theinsulationmaterialshallreachatleastClassB2combustionperformance;whenthefireresistanceratingofroofslabislessthan1.00h,theinsulationmaterialshallreachatleastClassB1combustionperformance.AsfortheexternalinsulationsystemadoptingClassB1orB2insulationmaterial,non-combustiblematerialshallbeadoptedastheprotectivelayerwhichshallnotbelessthan10mmthick.WhenClassesB1andB2insulationmaterialsareadoptedfortheexternalinsulationsystemofbothbuildingroofandexteriorwall,non-combustiblematerialshallbeadoptedtosetfireisolationbeltwithwidthnotlessthan500mmtoseparaterooffromexteriorwall.6.7.11TheelectriccircuitshallnotcrossorbelaidinClassB1orB2insulationmaterial;ifinevitable,fireprotectionmeasures,suchasthreadinginmetallicpipeandisolatingitbynon-combustibleinsulationmaterial,shallbetaken.Fireprotectionmeasures,suchasadoptingnon-combustibleinsulationmaterialforfireisolation,shallbetakensurroundingthepositionssetwithswitch,socketandotherelectricaccessories.6.7.12ClassAmaterialshallbeadoptedforthedecorationlayerofexteriorwall;howeverwhenthebuildingheightisnotgreaterthan50m,ClassB1materialmaybeadopted.75\n7FireFightingandRescueFacilities7.1FireLane7.1.1Theroadsinblocksshallconsiderthepassoffirevehicleandthedistancebetweentheroadcenterlinesshouldnotbegreaterthan160m.Whenthelengthofbuildingalongstreetisgreaterthan150moritstotallengthisgreaterthan220m,firelaneacrossthebuildingshallbearranged.Ifitisdifficult,circularfirelaneshallbearranged.7.1.2Asforhigh-risecivilbuildingsandsuchsingle-ormulti-storeypublicbuildingsasgymnasiumswithover3,000seats,assemblyhallswithover2,000seatsandstorebuildingsandexhibitionhallswithover3,000m2floorarea,thecircularfirelaneshallbearranged.Ifitisdifficult,firelanemaybearrangedalongthetwolongsidesofthosebuildings;asforhigh-riseresidentialbuildingsandthehigh-risecivilbuildingsnearbyhillylandorwatercourse,firelanemaybearrangedalongonelongsideofthosebuildings,butthefacadeofbuildingwithsuchlongsideshallbetheascendingoperationsurfaceoffirevehicle.7.1.3Firelaneshallbearrangedinfactoriesandstorages.Asforhigh-risefactorybuildings,CategoriesA,BandCfactorybuildingswithover3,000m2floorareaaswellasCategoriesBandCstorageswithover1,500m2floorarea,thecircularfirelaneshallbearranged.Ifitisdifficult,firelaneshallbearrangedalongthetwolongsidesofthosebuildings.7.1.4Asforbuildingswithenclosedgarthorcourtyard,ifthelengthoftheshortsideofgarthorcourtyardisgreaterthan24m,thefirelaneleadingtothegarthorcourtyardshouldbearranged;ifthebuildingsarelocatedalongstreet,thepedestrianpassagewayconnectingstreetandgarthshallbearranged(throughstaircase)andtheirspacingshouldnotbegreaterthan80m.7.1.5Facilitieshinderingthepassoffirevehicleorthesafeevacuationofpersonnelshallnotbearrangedonneithersideoffirelaneacrossbuildingorleadingtoitsgarth.7.1.6Asforopenstackyardforcombustiblematerial,LPGtankfarm,ClassA,B,Cliquidtankfarmsaswellascombustiblegastankfarm,thefirelaneshallbearranged.Thearrangementoffirelaneshallmeetthefollowingrequirements:1AsforstackyardsandtankfarmswiththestoragevolumegreaterthanthosespecifiedinTable7.1.6,thecircularfirelaneshouldbearranged.Table7.1.6StorageVolumeofStackyardsorTankFarmsCotton,linen,woolandStrawandreedTimberClassA,B,CliquidtanksLPGtankCombustiblegasNamechemicalfiber(t)(t)(m3)(m3)(m3)tank(m3)Storage1,0005,0005,0001,50050030,000volume2Asforstackyardforcombustibleswithover30,000m2floorarea,theintermediatefirelaneconnectedwiththecircularfirelaneshallbearranged;thespacingbetweenfirelanesshouldnotbegreaterthan150m.ConnectedfirelaneshouldbearrangedbetweenthecircularfirelanesinLPGtankfarm,ClassA,B,Cliquidtankfarmsandcombustiblegastankfarm.76\n3Thedistancefromtheedgeoffirelanetothecombustiblematerialstackshallnotbelessthan5m.7.1.7Firelaneshallbearrangedfornaturalwatersourceandfirepoolforsupplyingwaterforfirevehicle.Thedistancefromtheedgeoffirelanetothewater-intakingpointshouldnotbegreaterthan2m.7.1.8Thefirelaneshallmeetthefollowingrequirements:1Neithertheclearwidthnorclearheightofthevehicleaccessshallbelessthan4.0m.2Theturningradiusshallmeettherequirementsoffirevehicleturning.3Trees,overheadpipelinesandotherobstacleshinderingthefirevehicleoperationshallnotbearrangedbetweenthefirelaneandbuilding.4Thedistancefromthesideedgeoffirelaneclosetotheexteriorwalltotheexteriorwallshouldnotbelessthan5m.5Thegradientoffirelaneshouldnotbegreaterthan8%.7.1.9Atleasttwopositionsofthecircularfirelaneshallbeconnectedwithotheraccesses.Thestub-endfirelaneshallbearrangedwithlooporturnaroundandtheareaofturnaroundshallnotbelessthan12m×12m;asforhigh-risebuilding,theareaofturnaroundshouldnotbelessthan15m×15m;asforheavyfirevehicle,theareaofturnaroundshouldnotbelessthan18m×18m.Thepavementoffirelane,rescuesiteaswellasthepipeandunderdrainbelowthefirelaneandrescuesiteshallbeabletobearthepressurefromheavyfirevehicle.Urbanandruralroadsmaybeusedasfirelane,butsuchroadsshallmeetthepassing,turningandparkingrequirementsoffirevehicle.7.1.10Thefirelaneshouldnotcrosslevellywiththemaintrackofrailway.Iftheymustcrosswitheachotherlevelly,standbyaccessshallbearrangedandthespacingbetweentwoaccessesshallnotbelessthanthelengthofonetrain.7.2FieldforFireFighting7.2.1Asforhigh-risebuilding,theascendingoperationsiteoffirevehicleshallbearrangedcontinuouslyatleastalongonelongsideoronebottomsideof1/4theperipherallengthandnotlessthanthelengthofonelongside.Thepodiumdepthinsuchscopeshallnotbegreaterthan4m.Ifit'sdifficulttoarrangetheascendingoperationsiteoffirevehiclecontinuouslyfornotgreaterthan50mhighbuildings,itmaybearrangedatcertaininterval,buttheintervalshouldnotbegreaterthan30mandthetotallengthoftheascendingoperationsiteoffirevehicleshallmeettheaboverequirements.7.2.2Theascendingoperationsiteoffirevehicleshallmeetthefollowingrequirements:1Trees,overheadpipelinesandotherobstaclesandgarageexitandentrancehinderingthefirevehicleoperationshallnotbearrangedbetweenthesiteandthefactorybuilding,storageorcivilbuilding.2Thelengthandwidthofsiteshallnotbelessthan15mand10mrespectively.Asforbuildingswithheightgreaterthan50m,thelengthandwidthofsiteshallnotbeless77\nthan20mand10mrespectively.3Thesiteaswellasthebuildingstructure,pipeandunderdrainbelowitshallbeabletobearthepressurefromheavyfirevehicle.4Thesiteshallbeconnectedtothefirelane;thedistancefromthesideclosetoexteriorwallofsitetotheexteriorwallshouldnotbelessthan5mandshallnotbegreaterthan10m;andthesitegradientshouldnotbegreaterthan3%.7.2.3Asforthebuildingscopecorrespondingtotheascendingoperationsiteoffirevehicle,thestairsdirectlyleadingtooutdoororentrancedirectlyleadingtostaircaseshallbearranged.7.2.4Theexteriorwallsoffactorybuilding,storageandpublicbuildingshallbearrangedwithwindowsforfire-fightingandrescuepersonneltoenterattheproperpositionofeachstorey.7.2.5Theclearheightandclearwidthofwindowsforfire-fightingandrescuepersonnelenteringshallnotbelessthan1.0mrespectivelyandthedistancefromitsloweredgetoindoorgroundshouldnotbegreaterthan1.2m.Thespacingbetweenthemshouldnotbegreaterthan20mandatleast2windowsshallbearrangedforeachfirecompartment,withtheirarrangementpositionsoppositetotheascendingoperationsiteoffirevehicle.Thewindowglassshallbeeasytobreakandvisiblesignsshallbearrangedoutdoor.7.3FireElevator7.3.1Fireelevatorshallbearrangedforthefollowingbuildings:1Over33mhighresidentialbuildings;2CategoryIhigh-risepublicbuildingsandover32mhighCategoryIIhigh-risepublicbuildings;3Basementandsemi-basementinbuildingswithfireelevator,aswellasotherundergroundorsemi-undergroundbuildings(basementsandsemi-basements)withtheburieddepthgreaterthan10mandthetotalbuildingareagreaterthan3,000m2.7.3.2Thefireelevatorshallbearrangedindifferentfirecompartmentsrespectivelyandatleastonefireelevatorshallbearrangedineachfirecompartment.7.3.3Asforover32m-highhigh-risefactorybuilding(storage)withelevator,onefireelevatorshouldbearrangedineachfirecompartment.Fireelevatormaynotbearrangedforbuildingsmeetingthefollowingrequirements:1Over32m-highhigh-risetowerwithelevator,ifthenumberofpersonnelontheoperatingplatformatanyfloorisnotgreaterthan2;2CategoriesDandEfactorybuildingswithpartialheightover32mandthebuildingareaonanyflooroftheparthigherthan32mnotgreaterthan50m2.7.3.4Thepassengerelevatororcargoelevatorwhichmeetstherequirementsoffireelevatormayalsobeusedasfireelevator.7.3.5Exceptforfireelevatorssetinstoragevestibule,refrigerationstoragehallwayoroperationtowerofcerealsilo,otherfireelevatorsshallbesetwithfrontroomandshallmeetthefollowingrequirements:1Thefrontroomshouldbeclosetotheexteriorwallandshalldirectlyleadtooutdooratthefirstfloororleadtooutdoorthroughnotgreaterthan30mlongpassageway;78\n2Theutilizationareaoffrontroomshallnotbelessthan6.0m2;thefrontroomsharedwithsmoke-proofstaircaseshallmeettherequirementsof5.5.28and6.4.3inthiscode;3Exceptforentrance/exitoffrontroom,positivepressureairsupplyoutletarrangedinfrontroomandentrydoorspecifiedin5.5.27ofthiscode,otherdoors,windowsoropeningsshallnotbearrangedinthefrontroom;4ClassBfiredoorshallbeadoptedforfrontroomorsharedfrontroom,butrollershuttershallnotbearranged.7.3.6Firepartitionwallwithfireresistanceratingnotlessthan2.00hshallbearrangedbetweenfireelevatorshafts,machineroomsandadjacentelevatorshaftsandmachinerooms;ClassAfiredoorshallbeadoptedfordoorinpartitionwall.7.3.7Drainagefacilitiesshallbearrangedatthebottomoffireelevatorshaft.Thecapacityofdrainageshaftshallnotbelessthan2m3andthedischargeofdrainagepumpshallnotbelessthan10L/s.Waterretainingfacilitiesshouldbearrangedatthedoorwayofthefrontroomoffireelevatorroom.7.3.8Thefireelevatorshallmeetthefollowingrequirements:1Theelevatorshallbeabletostopateachfloor;2Theloadcapacityoftheelevatorshallnotbelessthan800kg;3Therunningtimeoftheelevatorfromthefirstfloortothetopfloorshouldnotbegreaterthan60s;4Water-proofmeasuresshallbetakenforthepowerandcontrolcable,electricwireaswellascontrolpaneloftheelevator;5Specialoperatingbuttonforfiremanshallbearrangedattheentranceoffireelevatoronthefirstfloor;6Non-combustiblematerialshallbeadoptedfortheinternaldecorationofelevatorcar;7Specialfiretalkbackshallbearrangedintheelevatorcar.7.4HelicopterLandingPad7.4.1Asforover100mhighpublicbuildingswiththebuildingareaofstandardstoreygreaterthan2,000m2,thehelicopterlandingpadorrescuefacilitiesforhelicoptershouldbearrangedontheirroofs.7.4.2Thehelicopterlandingpadshallmeetthefollowingrequirements:1Ifarrangedontheroofdeck,thehelicopterlandingpadshallbeatleast5mawayfromequipmentroom,elevatormachineroom,watertankroomaswellasprojectionslikecommonantenna;2Atleasttwobuildingexitsleadingtothelandingpadshallbearrangedandthewidthofeachexitshouldnotbelessthan0.90m;3Aircraftobstructionlampandemergencylightingshallbearrangedaroundthelandingpad;4Firehydrantshallbearrangedataproperpositiononthelandingpad;5Theotherrequirementsshallcomplywiththerelevantcurrentstandardsofthenationonaviationmanagement.79\n8ArrangementofFire-fightingFacilities8.1GeneralRequirements8.1.1Thefirewatersupplyaswellasfire-fightingfacilitiesshallbedeterminedcomprehensivelyaccordingtosuchfactorsasthepurposeandsignificanceofbuildings,firehazard,firecharacteristicsandambientconditions.8.1.2Incitiesandtowns(includingresidentialdistrict,businessdistrict,developmentareaandindustrialdistrict,etc.),municipalfirehydrantsystemshallbearrangedalongstreetonwhichfirevehiclecanpass.Outdoorfirehydrantsystemshallbearrangedsurroundingthecivilbuildings,factorybuildings,storages,tanks(farm)andstackyards.Theroofforparkingrescueandfirevehicleshallbearrangedwithoutdoorfirehydrantsystem.Note:Outdoorfirehydrantsystemmaynotbearrangedfornotgreaterthan3,000m3CategoryEfactorybuildingswithnotlessthanClassIIfireresistanceratingaswellasresidentialdistrictwithnotgreaterthantwostoreysand500residents.8.1.3Firepumpadaptershallbearrangedforsuchsystemsassprinklersystem,watersprayextinguishingsystem,foamextinguishingsystemandfixedfiremonitorextinguishingsystemaswellasthewatersupplysystemofindoorfirehydrantofthefollowingbuildings:1Over5-storeypublicbuildings;2Over4-storeyfactorybuildingsorstorages;3Otherhigh-risebuildings;4Over2-storeyundergroundbuildings(rooms)orthosewithover10,000m2buildingarea.8.1.4ThetanksinClassA,B,Cliquidtanks(tankfarm)shallbearrangedwithmovablehoseorfixedwatercoolingfacilities.AsforClassA,B,Covergroundliquidtankswithheightgreaterthan15morwithsingletankvolumegreaterthan2,000m3,thefixedwatercoolingfacilitiesshouldbeadopted.8.1.5AsforLPGtanks(tankfarm)withtotalvolumegreaterthan50m3orsingletankvolumegreaterthan20m3,thefixedwatercoolingfacilitiesshallbearranged.AsforembeddedLPGtanks,thefixedspraycoolingdevicesmaynotbearranged.AsforLPGtanks(tankfarm)withtotalvolumenotgreaterthan50m3orsingletankvolumenotgreaterthan20m3,themovablehoseshallbearranged.8.1.6Thearrangementoffirepumproomshallmeetthefollowingrequirements:1TheindependentfirepumproomshallreachatleastClassIIfireresistance;2Thefirepumproominbuildingsshallnotbearrangedonthethirdundergroundfloororbelowortheundergroundfloorwheretheheightdifferencebetweentheindoorgroundandtheoutdoorexitandentranceflooringisgreaterthan10m;3Theevacuationdoorshalldirectlyleadtooutdoororsafetyexit.8.1.7Firecontrolroomshallbearrangedforbuildings(groups)withfirealarmsystemand80\nfire-fightingfacilitiesrequiringlinkagecontrol.Thearrangementoffirecontrolroomshallmeetthefollowingrequirements:1TheindependentfirecontrolroomshallreachatleastClassIIfireresistance;2Thefirecontrolroominbuildingsshouldbearrangedonthefirstfloororfirstundergroundfloorandatapositionclosetotheexteriorwall;3Thefirecontrolroomshallnotbearrangednearbyroomswhicharesubjecttostrongelectromagneticfieldinterferenceormayaffectthenormaloperationoffirecontrolequipment;4Theevacuationdoorshalldirectlyleadtooutdoororsafetyexit.5Theequipmentconstitutioninfirecontrolroomanditscontrolanddisplayfunctiononbuildingfire-fightingfacilitiesaswellasthefunctionoftransmittingrelevantinformationtoremotemonitoringsystemshallmeettherequirementsofthecurrentnationalstandards"CodeforDesignofAutomaticFireAlarmSystem"(GB50116)and"GeneralTechnicalRequirementsforFireControlCenter"(GB25506).8.1.8Technicalmeasuresprotectingagainstfloodshallbetakenforfirepumproomandfirecontrolroom.8.1.9Thesmokeproofandexhaustfansetinbuildingsshallbearrangedindifferentspecialmachinerooms,andtherelevantfireseparationmeasuresshallmeettherequirementsof6.2.7inthiscode.8.1.10Fireextinguishershallbearrangedatthepublicpositionsofhigh-riseresidentialbuildingsandinthepublicbuildings,andfireextinguishershouldbearrangedatthepublicpositionsofotherresidentialbuildings.Fireextinguishersshallbearrangedatthefactorybuildings,storages,tanks(tankfarm)andstackyards.8.1.11Iftheexteriorwallisarrangedwithglasscurtainwallormadefromdecorativematerialorconstructionwhichmaycausethefalling-offofwallincaseoffire,theoutdoorfire-fightingfacilities(suchaspumpadapterandoutdoorfirehydrant)forfire-fightingandrescueshallbearrangedatthepositionwitharelativelysafedistancefromtheexteriorwallorbeprovidedwithsafetyprotectionmeasures.8.1.12Thefire-fightingfacilitiesarrangedinsideoroutsidebuildingsforpersonneltooperateoruseshallbearrangedwithvisiblesignswhichcanbedistinguishedfromtheenvironment.8.1.13Thedesignoffire-fightingsystemandfacilitiesshallmeettherequirementsofthecurrentnationalstandards"TechnicalCodeforFireProtectionWaterSupplyandHydrantSystems"(GB50974),"CodeofDesignforSprinklerSystems"(GB50084)and"CodeforDesignofAutomaticFireAlarmSystem"(GB50116).8.2IndoorFireHydrantSystem8.2.1Indoorfirehydrantsystemshallbearrangedforthefollowingbuildingsorlocations:1Factorybuildingsandstorageswithover300m2floorarea;2High-risepublicbuildingsandover21m-highresidentialbuildings;Note:Ifitisdifficulttoarrangeindoorfirehydrantsystemforresidentialbuildingwithheightnothigherthan27m,81\nonlythedryfirestandpipeandDN65indoorfirehydrantwithoutfirehydrantboxmaybearranged.3Over5,000m3single-/multi-storeybuildingssuchaswaitingbuildingsinstations,wharfsandairports,exhibitionbuildings,storebuildings,hotelbuildings,medicalbuildingsandlibrarybuildings,etc.;4Single-/multi-storeybuildingssuchasspecialclassandfirstclasstheatres,otherclassesoftheatresandcinemaswithover800seats,aswellasauditoriumsandgymnasiumswithover1,200seats,etc.;5Over15mhighorover10,000m3officebuildings,teachingbuildingsaswellasothersingle-/multi-storeycivilbuildings.8.2.2Indoorfirehydrantsystemmaynotbearrangedforbuildingsorlocationsnotspecifiedin8.2.1ofthiscodeaswellasthefollowingbuildingsorlocationswhichmeettherequirementsof8.2.1inthiscode,butthefirehosereelorportablefirehoseshouldbearranged:1Single-/multi-storeyCategoriesDandEfactorybuildings(storages)withClassIorIIfireresistanceratingandfewcombustible.2Notgreaterthan3,000m3CategoryDfactorybuildingswithClassIIIorIVfireresistancerating;notgreaterthan5,000m3CategoryEfactorybuildings(storages)withClassIIIorIVfireresistancerating.3Grainstorages,treasuriesaswellasunattendedindependentbuildingsfarawayfromcitiesandtowns.4Buildingswitharticleswhichmaycausecombustionandexplosionifexposedtowater.5Othernotgreaterthan5,000m3buildingswithoutindoorproductionanddomesticwaterpipelinesandwithoutdoorfirewatersupplytanks.8.2.3Indoorfirehydrantsystemshouldbearrangedforkeybrick-timberstructureortimberstructureantiquebuildingsofnationalrelicprotectionunits.8.2.4Firehosereelorportablefirehoseshallbearrangedforcrowdedpublicbuildings,aswellasover100mhighandgreaterthan200m2commercialfacilities.Portablefirehoseshouldbearrangedinsidethehigh-riseresidentialbuildings.8.3AutomaticFireExtinguishingSystem8.3.1Unlessotherwisestatedinthiscodeandexceptthelocationswherewatershouldnotbeappliedforprotectionorfireextinguishment,theautomaticfireextinguishingsystemshallbesetatthefollowingfactorybuildingsorproductionpositions,andsprinklersystemshouldbeadopted:1Theunpackingandblowingworkshopsofthecottonmillwithnolessthan50,000spindles,thesortingandcardingworkshopsofflaxmillwithnolessthan5,000spindles,andthesplintscorchingandscreeningpositionsofmatchfactory;2Thesingle-/multi-storeyfactorybuildingswithfloorarealargerthan1,500m2ortotalbuildingarealargerthan3,000m2forthesimilarproductionpurposessuchasshoemaking,clothingmaking,toysandelectronics;3Woodenwarefactorybuildingwithfloorarealargerthan1,500m2;4Thepre-foaming,forming,slicingandembossingpositionsoffoamplastic82\nfactory;5High-riseCategoriesBandCfactorybuildings;6Undergroundorsemi-undergroundCategoryCfactorybuildingswithbuildingarealargerthan500m2.8.3.2Unlessotherwisestatedinthiscodeandexceptthestorageswherewatershouldnotbeappliedforprotectionorfireextinguishment,theautomaticfireextinguishingsystemshallbesetatthefollowingstorages,andsprinklersystemshouldbeadopted:1Storagesofcotton,wool,silk,linen,chemicalfiber,furandtheirproducts,withthefloorarealargerthan1,000m2;Note:Asforthecottonstoreroomwithsingle-storeyfloorareanolargerthan2,000m2,thesprinklersystemmaynotbeset.2Matchstoragewithfloorarealargerthan600m2;3Emptypostbagstoragewithbuildingarealargerthan500m2inthepostbuilding;4Highrack/high-risestoragesofcombustibleanddifficult-combustiblearticles;5Highrackrefrigerationstoragewithdesigntemperaturehigherthan0℃ornon-highrackrefrigerationstoragewithdesigntemperaturehigherthan0℃andbuildingareaofeachfirecompartmentlargerthan1,500m2;6Undergroundstorageofcombustiblearticleswithtotalbuildingarealargerthan500m2;7Othersingle-ormulti-storeyCategoryCarticlestorageswithfloorarealargerthan1,500m2ortotalbuildingarealargerthan3,000m2.8.3.3Unlessotherwisestatedinthiscodeandexceptthelocationswherewatershouldnotbeappliedforprotectionorfireextinguishment,theautomaticfireextinguishingsystemshallbesetinthefollowinghigh-risecivilbuildingsorlocations,andsprinklersystemshouldbeadopted:1CategoryIhigh-risepublicbuildings(exceptswimmingpoolandskatingrink)andtheirbasementsandsemi-basements;2Thepublicactivitiesrooms,passageways,offices,hotelguestrooms,combustiblearticlestorerooms,andbottomsofescalatorsinCategoryIIhigh-risepublicbuildingsandintheirbasementsandsemi-basements;3Thesinginganddancingentertainmentandshowvenuesinhigh-risecivilbuildings;4Residentialbuildingwithbuildingheightlargerthan100m.8.3.4Unlessotherwisestatedinthiscodeandexceptthelocationswherewatershouldnotbeappliedforprotectionorfireextinguishment,theautomaticfireextinguishingsystemshallbesetinthefollowingsingle-/multi-storeycivilbuildingsorlocations,andthesprinklersystemshouldbeadopted:1Thespecial-classandfirst-classtheatres,theatresofotherclasseswithmorethan1,500seats,assemblyhallsorauditoriumswithmorethan2,000seats,gymnasiumswithmorethan3,000seats,andtheindoorrestrooms,equipmentroomsandthelikeofstadiumswhichcanholdmorethan5,000people;2Theexhibition,store,cateringserviceandhotelbuildingswiththebuildingareaofanyfloorlargerthan1,500m2orthetotalbuildingarealargerthan3,000m2,andthe83\ninpatientbuilding,outpatientbuildingandoperationdepartmentofthesamebuildingscaleinhospital;3Theofficebuildingswithtotalbuildingarealargerthan3,000m2andwithcentralairconditioningsystemforsupplyandreturnairducts(pipes);4Librarywithcollectionofbooksexceeding500,000;5Largeandmediumsizekindergartens,andseniorcitizenbuildingwiththetotalbuildingarealargerthan500m2;6Undergroundorsemi-undergroundstoreswithtotalbuildingarealargerthan500m2;7Thesinginganddancingentertainmentandshowvenues(excepttheswimminglocations)beingarrangedundergroundorsemi-undergroundoronthefourthfloorovergroundorabove,andtheovergroundsinginganddancingentertainmentandshowvenues(excepttheswimminglocations)beingarrangedonthefirst,secondorthirdfloorandwiththebuildingareaofanystoreylargerthan300m2.8.3.5Fortheexhibitionhalls,audiencehallsandothercrowdedlocationsaswellastheCategoryCproductionworkshops,storeroomsandotherlarger-spacelocationswherearedifficulttosetsprinklersystem,otherautomaticfireextinguishingsystemsshallbeset,andthefixedfiremonitorsandotherfireextinguishingsystemsshouldbeadopted.8.3.6Watercurtainsystemshouldbesetatthefollowingpositions:1Theprosceniumarchesaswellastheopeningsofsuchsidestagesandbackstagesconnectingwiththeprosceniuminthespecial-classandfirst-classtheatres,thetheatresofotherclasseswithmorethan1,500seats,theassemblyhallsorauditoriumswithmorethan2,000seatsandthetheatresorauditoriumswithmorethan800seatsinthehigh-risecivilbuildings;2Partialopeningpositionswherethefireseparatorssuchasfirewallsshallbearrangedbutunabletobearranged;3Theupperpartoffirerollershutterorfireproofcurtaininneedofcoolingprevention.Note:Fireproofcurtainshallalsobeadoptedfortheseparationattheprosceniumarch,andClassBfiredoorsandwindowsshouldbearrangedatthesmalleropeningsofsidestageandbackstage.8.3.7Delugesprinklersystemshallbearrangedinthefollowingbuildingsandatthefollowingpositions:1Potassiumchlorategrindingfactorybuildingsofmatchfactories,andthefactorybuildingswiththebuildingarealargerthan100m2andusedfortheproductionorapplicationofnitrocotton,paintspraycotton,collodion,xyloniterubbersheetandnitrocellulose;2Rolledcompact,sectioning,ball-grindingandballseparationinspectionpositionsoftabletennisfactories;3Thestoragesofnitrocotton,paintspraycotton,collodion,xyloniterubbersheetandnitrocellulose,withthebuildingarealargerthan60m2orstoragevolumelargerthan2t;4ThecylinderingroomsandsolidcylinderstoragesintheLPGstorageanddistributionstationwithdailycylinderingquantityexceeding3,000;5Thelowerpartofstagegridinspecial-classandfirst-classtheatres,thetheatresofotherclasseswithmorethan1,500seatsandtheassemblyhallsorauditoriumswith84\nmorethan2,000seats;6Thestudiowithbuildingareanolessthan400m2andmoviestudiowithbuildingareanolessthan500m2.8.3.8Theautomaticfireextinguishingsystemshallbesetinthefollowinglocations,andthewatersprayextinguishingsystemshouldbeadopted:1Theoilimmersedtransformerofthefactorieswithsinglecapabilityat40MV·Aorabove,theoilimmersedtransformerofpowerplantwithsinglecapabilityat90MV·Aoraboveandtheoilimmersedtransformerofindependentsubstationwithsinglecapabilityat125MV·Aorabove;2Thetrialrunpositionofaircraftenginetestbench;3Highvoltagecapacitorandheavyoilswitchroomfilledwithcombustibleoilandarrangedinhigh-risecivilbuildings.Note:Asfortheindooroilimmersedtransformerandthehighvoltagecapacitorandheavyoilswitchroomfilledwithcombustibleoil,thewatermistsprayfireextinguishingsystemmaybeadopted.8.3.9Theautomaticfireextinguishingsystemshallbesetinthefollowinglocationsandthegasfireextinguishingsystemshouldbeadopted:1Themicrowavemachinerooms,decimetricwavemachinerooms,metricwavemachinerooms,powertransformationanddistributionroomsanduninterruptedpowersupply(UPS)roomsinbroadcasttelevisionlaunchingtowersatnationalandprovinciallevelsaswellasthoseofcitieswithpopulationofmorethan1million;2Long-distanceSPCexchange(storedprogramcontrolexchange)rooms,controlroomsandsignallingtransferpointroomsoftheinternationaltelecommunicationoffices,regionalcenters,provincialcentersandthedistrictcenterswithmorethan10,000routes;3TheSPCexchangerooms,controlroomsandsignallingtransferpointroomsoflocaltandemofficeswithmorethan20,000linesandlocalendofficeswithmorethan60,000entries;4Communicationroomsandcontrolroomsinthepublicsecurityanddisasterpreventiondispatchcontrolcentersatcentralandprovinciallevelsaswellasthoseinpowerdispatchcontrolcentersoflarge-scaleorabove;5ThemainmachineroomsofClassesAandBelectronicinformationsystemmachineroomsandtheloggedmagnetism(paper)mediastoragesinthebasicworkshops;6Theaudiovisualproductsstoreroomswithbuildingareanotlessthan120m2inthecentralandprovincialbroadcast&televisioncenters;7Thespecialcollectionstoragesofthenationalandprovinciallibrariesorlibrarieswiththecollectionofbooksmorethan1million;thestoragesforpreciousfilesandnon-paperfilesinthecentralandprovincialarchives;treasurestoragesinthelargeandmediumscalemuseums;theshowroomofGradeIpaperandthin-silkculturalrelics;8Otherspecialimportantequipmentrooms.Notes:1WatermistsprayfireextinguishingsystemmaybeadoptedatthepositionsspecifiedinItems1,4,5and8ofthisarticle.85\n2Whentherearestandbymainmachineandstandbyloggedmagnetism(paper)media,whicharearrangedindifferentbuildingsordifferentfirecompartmentsinthesamebuilding,thepreactsprinklersystemmaybeadoptedatthepositionsspecifiedinItem5ofthisarticle.8.3.10ThefireextinguishingsystemsforClassA,B,Cliquidtanksshallbesetaccordingtothefollowingrequirements:1Fixedfoamextinguishingsystemshallbesetforthefixedrooftankwithsinglecapacitylargerthan1,000m3;2Mobilefoamfireextinguishingsystemmaybeadoptedforthestoragetankwiththewallheightlessthan7morcapacitynotlargerthan200m3;3Semi-fixedfoamextinguishingsystemshouldbeadoptedforotherstoragetanks;4ThefireextinguishingsystemforClassA,B,Cliquidtanksintheoildepot,petrochemicalindustryandpetroleumgasengineeringshallbesetaccordingtotherequirementsofthecurrentnationalstandard"CodeforDesignofOilDepot"(GB50074)andotherrelevantstandards.8.3.11Asfortherestaurantsorcanteenswiththebuildingareaofdiningroomlargerthan1,000m2,theautomaticfireextinguishersshallbeequippedatthefumeexhaustcoversandcookingpositionsinthecookingrooms,andtheautomaticdisconnectingdeviceslinkedwiththeautomaticfireextinguishersshallbeinstalledonthegasorfuelpipes.Automaticfireextinguishersshouldbearrangedatthefoodprocessingpositionswithopenfireworkorhightemperatureedibleoilinthefoodindustryprocessinglocations.8.4FireAlarmSystem8.4.1Firealarmsystemshallbesetforthefollowingbuildingsorlocations:1Factorybuildingswithbuildingareaofanyfloorlargerthan1,500m2orthetotalbuildingarealargerthan3,000m2andforthesimilarproductionpurposessuchasshoemaking,clothingmaking,toysandelectronics;2Storagesofcotton,wool,silk,linen,chemicalfiberandtheirproducts,withthefloorarealargerthan1,000m2;cigarettestorageswithfloorarealargerthan500m2ortotalbuildingareagreaterthan1,000m2;3Buildingsforsuchsimilarpurposesasstores,exhibition,financeandtrade,passengertransportandfreight,withthebuildingareaofeachfloorlargerthan1,500m2ortotalbuildingarealargerthan3,000m2;undergroundorsemi-undergroundstoreswithtotalbuildingarealargerthan500m2;4Storagesforpreciousbooksorculturalrelics,librarieswiththecollectionofbooksmorethan500thousand,andimportantarchives;5Prefecture-levelorabovebroadcast&televisionbuildings,postbuildingsandtelecommunicationbuildings;urbanorregionalcommandinganddispatchingbuildingsofelectricity,transportationanddisasterprevention;6Special-classandfirst-classtheatres;theatresorcinemasofotherclasseswithmorethan1,500seats;assemblyhallsorauditoriumswithmorethan2,000seats;gymnasiumswithmorethan3,000seats;7Childrenroomsandotherlocationsoflargeormediumsizekindergartens;86\nseniorcitizenbuildings;sanatoriuminpatientbuildings,hotelbuildingsandotherchildrenplaygroundswiththebuildingareaofanyfloorlargerthan1,500m2ortotalbuildingarealargerthan3,000m2;outpatientbuildings,inpatientbuildingsandoperationdepartmentsofhospitalswithatleast200beds;8Singinganddancingentertainmentandshowvenues;9Technicalmezzaninecontainingmuchcombustiblesandwithclearheightgreaterthan2.6m;interioroftheblindceilingorsuspendedceilingcontainingcombustiblesandwithclearheightgreaterthan0.8m;10Mainmachineroomsofelectronicinformationsystemsandtheircontrolroomsandrecordingmediumstorages;roomsofmachinery,metersandinstrumentsofspecialvalueorlargerfirehazardaswellasstoragesofvaluables;11Storagesforcombustibleswiththebuildingarealargerthan50m2orbusinesshallswiththebuildingarealargerthan500m2inCategoryIIhigh-risepublicbuildings;12OtherCategoryIhigh-risepublicbuildings;13Locationsorpositionswherearesetwithmechanicalsmokeexhaust,smokecontrolsystem,delugeorpreactsprinklersystem,fixedfirewatermonitorextinguishingsystemandgasfireextinguishingsystemwhichareunderinterlockingoperationwithfirealarmsystem.8.4.2Theresidentialbuildingswiththebuildingheightlargerthan100mshallbeequippedwithfirealarmsystem.Firealarmsystemshallbesetatthepublicpositionsofresidentialbuildingswiththebuildingheightof54~100m;firedetectorsshouldbearrangedinside.Firealarmsystemshouldbesetatthepublicpositionsofhigh-riseresidentialbuildingswiththebuildingheightnotgreaterthan54m.Whenthefire-fightingfacilitiesinneedoflinkagecontrolareinstalled,thefirealarmsystemshallbesetatthepublicpositions.Alarmdevicesoremergencyfirebroadcastprovidedwithvoicefunctionshallbesetatthepublicpositionsofhigh-riseresidentialbuildings.8.4.3Combustiblegasalarmdevicesshallbesetatthelocationswheremayemitcombustiblegasesorvaporsinabuilding.8.5SmokeControlandSmokeExhaustSystem8.5.1Smokecontrolfacilitiesshallbeinstalledatthefollowinglocationsorpositionsofthebuilding:1Smoke-proofstaircaseanditsfrontroom;2Frontroomorsharedfrontroomofafireelevatorroom;3Frontroomorrefugefloor(room)ofexitpassageway.Asforthepublicbuildings,factorybuildingsandstorageswiththebuildingheightnotgreaterthan50mandtheresidentialbuildingswiththebuildingheightnotgreaterthan100m,whenthefrontroomorsharedfrontroomoftheirsmoke-proofstaircasemeetsoneofthefollowingconditions,thesmokecontrolsystemmaynotbearrangedinthestaircase:1Thefrontroomorsharedfrontroomadoptsopenbalconyandconcavecorridor;87\n2Thefrontroomorsharedfrontroomisprovidedwithopenableexternalwindowsindifferentorientationsandtheareaofsuchwindowsmeetsthearearequirementsofnaturalsmokevent.8.5.2Smokeexhaustfacilitiesshallbeinstalledatthefollowinglocationsorpositionsoffactorybuildingorstorage:1CategoryCproductionplaceswithlargenumberofpeopleorcombustibles;Theovergroundroomswiththebuildingarealargerthan300m2andbeingfrequentlyvisitedbypeopleandcontainingmanycombustiblesinCategoryCfactorybuildings;2TheCategoryDproductionworkshopswithbuildingareagreaterthan5,000m2;3TheCategoryCstorageswiththefloorareagreaterthan1,000m2;4Theevacuationpassagewayswithlengthlargerthan20minsuchhigh-risefactorybuildings(storages)withheightlargerthan32m;theevacuationpassagewayswithlengthlargerthan40minotherfactorybuildings(storages).8.5.3Thesmokeexhaustfacilitiesshallbeinstalledatthefollowinglocationsorpositionsofcivilbuildings:1Thesinginganddancingentertainmentandshowvenuesarrangedonthefirst,secondorthirdfloorandwiththebuildingareagreaterthan100m2,orthosearrangedonthefourthfloororaboveaswellastheundergroundorsemi-undergroundones;2Theatriums;3Theovergroundroomswithbuildingarealargerthan100m2andfrequentlyvisitedbypeopleinpublicbuildings;4Theovergroundroomswithbuildingarealargerthan300m2andcontainingmanycombustiblesinpublicbuildings;5Theevacuationpassagewayswithlengthgreaterthan20minbuildings.8.5.4Asfortheundergroundorsemi-undergroundbuildings(basementsorsemi-basements)andtheroomswithoutwindowinovergroundbuildings,whenthetotalbuildingareaislargerthan200m2orthebuildingareaofoneroomislargerthan50m2andtheyarefrequentlyvisitedbypeopleorcontainmanycombustibles,thesmokeexhaustfacilitiesshallbearranged.88\n9Heating,VentilatingandAirConditioning9.1GeneralRequirements9.1.1Theheating,ventilatingandairconditioningsystemsshallbetakenwithproperfirepreventionmeasures.9.1.2TheairinCategoriesAandBfactorybuildingsshallnotberecycled.TheaircontainingdustsorfibersofcombustionorexplosionhazardinCategoryCfactorybuildingsshallbepurifiedbeforerecycling,andtheparticleconcentrationinsuchairshallbe25%lowerthanitslowerexplosionlimit.9.1.3AirsupplyandexhaustequipmentservingforCategoriesAandBfactorybuildingsshallbearrangedindifferentventilationhousesrespectively;exhaustequipmentshallnotbearrangedinthesameventilationhousewiththeairsupply/exhaustequipmentofotherrooms.9.1.4Naturalventilatingorindependentmechanicalventilatingfacilitiesshallbeadoptedfortheroomscontainingmaterialsoffireorexplosionhazardincivilbuildings,andsuchairshallnotberecycled.9.1.5Whentheaircontainslightercombustiblegases,thewholehorizontalairexhaustpipeshallbelaidbyupwardslopealongtheairflowdirection.9.1.6ThecombustiblegaspipelinesandthepipelinesofClassA,B,Cliquidshallnotpassthroughanyventilationhouseorventilatingpipe,andshallnotbelaidneartotheouterwallofventilatingpipe.9.2Heating9.2.1Theaveragesurfacetemperatureofradiatorsinthefactorybuildingswhichemitcombustibledustsandfibersshallnotbegreaterthan82.5℃;andtheaveragesurfacetemperatureofradiatorsatcoalhandlingcorridorsshallnotbegreaterthan130℃.9.2.2TheopenfireandelectricheatradiatorsforheatingarestrictlyforbiddeninCategoriesAandBfactorybuildings(storages).9.2.3Non-recyclingwarmairheatingshallbeadoptedforthefollowingfactorybuildings:1Factorybuildingswhichemitcombustiblegases,vapor,dustsorfibersintheproductionprocessandmaycausecombustionbythecontactwithsurfacesofheatingpipelinesandradiators;2Factorybuildingswhichemitdustsintheproductionprocessandmaycausespontaneousignition,explosionorgenerateexplosivegasesundertheactionofwaterorwatervapor.9.2.4Heatingpipelinesshallnotpassthroughtheroomscontainingsuchgases,vaporsorduststhatmaycausecombustionorexplosionbycontactingwithheatingpipelines,andthenon-combustiblematerialsshallbeadoptedforheatinsulationiftheymustpassthroughtheserooms.9.2.5Certaindistanceshallbekeptbetweenheatingpipelineandcombustibles,andshallmeetthefollowingrequirements:89\n1Whenthesurfacetemperatureofheatingpipelineisgreaterthan100℃,thedistanceshallnotbelessthan100mmorthenon-combustiblematerialsshallbeadoptedforheatinsulation;2Whenthesurfacetemperatureofheatingpipelineisnotgreaterthan100℃,thedistanceshallnotbelessthan50mmorthenon-combustiblematerialsshallbeadoptedforheatinsulation.9.2.6Thethermalinsulatingmaterialsforheatingpipelinesandequipmentinbuildingsshallmeetthefollowingrequirements:1AsforCategoriesAandBfactorybuildings(storages),non-combustiblematerialsshallbeadopted;2Asforotherbuildings,non-combustiblematerialsshouldbeadoptedandcombustiblesshallnotbeadopted.9.3VentilatingandAirConditioning9.3.1Asforventilatingandairconditioningsystems,firecompartmentsshouldbearrangedhorizontally,whiletheverticalarrangementshouldnotexceed5floors.Whenbackflowpreventersorfiredampersareadoptedforpipelines,thepipelinearrangementmaynotbelimitedbytheabove-mentionedcondition.Theverticalairductsshallbearrangedinpipewells.9.3.2Airexhaustpipelinesusedattheexplosionhazardouslocationsoffactorybuildingsarestrictlyforbiddentopassthroughfirewallsortheroompartitionwallswithexplosionhazard.9.3.3Airsupply/exhaustpipelineswithinCategoriesA,BandCfactorybuildingsshouldbearrangedinlayers.Whenfiredampersarearrangedatthepositionswhichhorizontalorverticalairsupplypipelinesenterintotheproductionworkshop,anairsupplysystemmaybesharedbytheverticalairsupplypipelinesofalllayers.9.3.4Asforroomscontainingcombustibleorexplosivematerialsintheair,theexplosion-proofventilatingequipmentshallbeadoptedfortheairsupply/exhaustsystem.Commonventilatingequipmentmaybeadoptedwhentheairfeederisarrangedinseparatedventilationroomandbackflowpreventerissetonthemainairsupplypipeline.9.3.5Theaircontainingdustsofcombustionandexplosionhazardshallbetreatedbynon-scintillantdedusterbeforeenteringintotheexhaustblower.Asfordustswhichmayexplodeonmeetingwater,itisstrictlyforbiddentoadoptthewetdedusters.9.3.6Thededusterandexhaustblowerhandlingthedustswithexplosionhazardshallbesetseparatelyfromothercommonblowersanddedusters,andshouldbesetaccordingtosingledustgroup.9.3.7Drydedustersandfilterspurifyingtheexplosion-hazardousdustsshouldbearrangedintheindependentbuildingsoutsidethefactorybuildings,andthefireseparationdistancebetweentheexteriorwallsofbuildingsandthefactorybuildingsshallnotbelessthan10m.Thedrydedustersandfilterswhichareprovidedwithcontinuousdeashingfunctionorprovidedwithperiodicaldeashingfunctionandwithairvolumenogreaterthan15,000m3/handduststorageofdusthopperlessthan60kgmaybearrangedinseparateroomsinthefactorybuildings,butshallbeseparatedfromotherpositionsbyadoptingwithfirepartition90\nwallswithfireresistanceratingnotlessthan3.00handfloorslabswithfireresistanceratingnotlessthan1.50h.9.3.8Pressurereliefdevicesshallbesetforallthededusters,filtersorpipelinespurifyingortransmittingexplosivedustsandchips.Drydedustersandfilterspurifyingexplosivedustsshallbearrangedatthenegativepressuresectionofthesystem.9.3.9Theairexhaustsystemexhaustingcombustibleorexplosivegases,vaporanddustsshallmeetthefollowingrequirements:1Theairexhaustsystemshallbesetwithgroundingdevicetoconductorremovestatic;2Airexhaustequipmentshallnotbearrangedinundergroundorsemi-undergroundbuildings(basementorsemi-basement);3Exhaustpipelinesshalladoptmetalpipelinesandshallbeledtotheoutdoorsafeplaces;theyshallnotbeconcealed.9.3.10Asforpipelinesexhaustingortransmittingairorothergasesandcombustiblechipswithtemperaturegreaterthan80℃,theclearancebetweenthemandthecombustibleordifficult-combustibleobjectsshallnotbelessthan150mm,ornon-combustiblematerialswiththicknessnotlessthan50mmshallbeadoptedforheatinsulation;whenthepipelinesarearrangedupanddown,theoneswithhighersurfacetemperatureshallbearrangedattheupperposition.9.3.11Airpipesofventilatingandairconditioningsystemsshallbesetwiththefiredamperswithnominaloperatingtemperatureof70℃atthefollowingpositions:1Thepositionspassingthroughthefirecompartment;2Thepositionspassingthroughtheroompartitionwallsandfloorslabsofventilatingandairconditioningrooms;3Thepositionspassingthroughtheroompartitionwallsandfloorslabsofimportantlocationsorlocationswithhigherfirehazard;4Bothsidesofthedeformationjointspassingthroughthefireseparationplace;5Onthehorizontalpipesectionjointedbyverticalairpipeandhorizontalairpipeofeachlayer.Note:Whentheventilatingandairconditioningsystemsofeachfirecompartmentinthebuildingaresetindependently,thejointsofhorizontalairpipesandverticalmainpipesmaynotbesetwithfiredampers.9.3.12Fortheverticalexhaustpipesinbathrooms,toiletsandkitchensofpublicbuildings,themeasurestopreventbackflowshallbetakenandthefiredamperswithnominaloperatingtemperatureof70℃shouldbesetonthebranchpipes.Theoil-fumeexhaustpipesofkitchensinpublicbuildingsshouldbesetaccordingtofirecompartments,andthefiredamperswithnominaloperatingtemperatureof150℃shallbesetatthejointsofverticalexhaustpipeswithbranchpipes.9.3.13Thearrangementoffiredampersshallmeetthefollowingrequirements:1Thefiredampersshouldbesetclosetothefireseparationplace;2Whenthefiredampersareinstalledinaconcealedway,manholeforconvenientmaintenanceshallbearrangedattheinstallationposition;3Theairpipesandheatinsulatingmaterialswithin2.0monbothsidesofthefiredampersshallbemadeofnon-combustiblematerials;91\n4Thefiredampersshallmeettherequirementsofthecurrentnationalstandard"FireDampersforBuilding-ventingandSmoke-ventingSystem"(GB15930).9.3.14Theairpipesofventilatingandairconditioningsystemsshallbemadeofnon-combustiblematerials,unless:1Theairpipesandflexiblejointscontactingwithcorrosivemediamaybemadeofdifficult-combustiblematerials;2Asfortheairpipesofventilatingandairconditioningsystemsinsuchlarge-spacebuildingssuchasgymnasiums,exhibitionhallsanddeparture(waiting)buildings,single-/multi-storeyofficebuildingsandCategoriesC,DandEfactorybuildings,iftheydonotthroughthefirecompartmentandaresetwithfiredampersatthepositionspassingthroughroompartitionwalls,theymaybemadeofdifficult-combustiblematerials.9.3.15Theheatinsulatingmaterialsofequipmentandairpipesandthehumidifyingmaterials,deadenersandbindersforhumidifiersshalladoptnon-combustiblematerials,andtheymayadoptdifficult-combustiblematerialsifitisindeeddifficulttoadoptnon-combustiblematerials.Whentheelectricheaterissetintheairpipe,theon-offofelectricheatershallbeinterlockedandcontrolledwiththestart/stopofblower.Fortheairpipeswithin0.8mbeforeandaftertheelectricheaterandthosepassingthroughtheroomseasytobeonfireduetohightemperatureandignitionsource,thenon-combustiblematerialsshallbeadopted.9.3.16Naturalventilatingormechanicalventilatingfacilitiesshallbearrangedinthefuel-orgas-firedboilerhouses.Thegas-firedboilerhouseshallbesetwithexplosion-proofemergencyexhaustblower.Ifmechanicalventilationisadopted,themechanicalventilatingfacilitiesshallbeequippedwithgroundingdevicestoconductorremovestatic,andtheventilationvolumeshallmeetthefollowingrequirements:1Thenormalventilationvolumeofoil-firedboilerhouseshallbedeterminedaccordingtoventilationratenotlessthan3times/h;whiletheemergencyexhaustvolumeshallbedeterminedaccordingtoventilationratenotlessthan6times/h;2Thenormalventilationvolumeofgas-firedboilerhouseshallbedeterminedaccordingtoventilationratenotlessthan6times/h;whiletheemergencyexhaustvolumeshallbedeterminedaccordingtoventilationratenotlessthan12times/h.92\n10ElectricSystem10.1FirePowerSupplyandDistribution10.1.1ThefirepowerinthefollowingbuildingsshallbesuppliedaccordingtoClassIload:1CategoriesBandCfactorybuildingsandCategoryCstoragesbuildingheighthigherthan50m;2CategoryIhigh-risecivilbuildings.10.1.2Thefirepowerinthefollowingbuildings,tanks(tankfarm)andstockyardsshallbesuppliedaccordingtoClassIIload:1Factorybuildings(storages)withoutdoorfiredemandgreaterthan30L/s;2Combustiblesstackyards,combustiblegastanks(tankfarm)andClassA,Bliquidtanks(tankfarm)withoutdoorfiredemandgreaterthan35L/s;3Graindepotsandgrainsiloes;4CategoryIIhigh-risecivilbuildings;5Cinemasandtheaterswithmorethan1,500seats,gymnasiumswithmorethan3,000seats,storesandexhibitionbuildingswiththebuildingareaofanyfloorgreaterthan3,000m2.Broadcast&television,telecommunication,financeandtradebuildingsatprovincial(municipal)levelorabove,otherpublicbuildingswithoutdoorfiredemandgreaterthan25L/s.10.1.3Thefirepowerinthebuildings,tanks(tankfarm)andstockyardsnotspecifiedin10.1.1and10.1.2ofthiscodeshallbesuppliedaccordingtoClassIIIload.10.1.4Asforbuildings,inwhichthefirepowerissuppliedaccordingtoClassIorIIload,ifself-providedgeneratingequipmentisadoptedasstandbypowersupply,theself-providedgeneratingequipmentshallbearrangedwithautomaticandmanualstartupdevice.Ifautomaticstartupisadopted,itshallguaranteetosupplypowerwithin30s.Powersupplywithdifferentclassloadshallmeettherequirementsofthecurrentnationalstandard"CodeforDesignofElectricPowerSupplySystems"(GB50052).10.1.5Thecontinuousservingtimeofthestandbypowersupplyforfireemergencylightingandevacuationindicatingsigninbuildingsshallmeetthefollowingrequirements:1Asforcivilbuildingshigherthan100m,thecontinuousservingtimeshallnotbelessthan1.5h;2Asformedicalbuildings,buildingsfortheaged,publicbuildingswithtotalbuildingareagreaterthan100,000m2andunderground&semi-undergroundbuildingswithtotalbuildingareagreaterthan20,000m2,thecontinuousservingtimeshallnotbelessthan1.0h;3Thecontinuousservingtimeforotherbuildingsshallnotbelessthan0.5h.10.1.6Dedicatedpowersupplycircuitshallbeadoptedforfire-fightingelectricequipment;whentheproductionandlivingpowerinbuildingiscutoff,thefirepowershallbeguaranteed.Theservingtimeandcapacityofstandbyfirepowersupplyshallmeetthe93\nrequirementsofeachfire-fightingelectricequipmentduringthefire.10.1.7Thefire-fightingdistributingmainshouldbeclassifiedaccordingtofirecompartment,andthefire-fightingdistributionbranchshouldnotpassthroughthefirecompartment.10.1.8Asforthepowersupplyforelectricequipmentandfireelevatorswithinfirecontrolroom,firepumproomandsmokecontrol&smokeexhaustfanroom,automaticswitchoverdevicesshallbearrangedatthelaststagedistributionboxofthedistributionline.10.1.9Asforfire-fightingequipmentpoweredaccordingtoClassIorIIload,thedistributionboxshallbearrangedseparately;whileforthefire-fightingequipmentpoweredaccordingtoClassIIIload,thedistributionboxshouldbearrangedseparately.Clearmarksshallbearrangedforfire-fightingdistributionequipment.10.1.10Thefire-fightingdistributionlinesshallmeetthedemandsofconsecutivepowersupplyduringfireandthereofthelayingshallmeetthefollowingrequirements:1Wherelayingisconductedinanexposedway(includinglayinginthesuspendedceiling),metalconduitsorclosedmetalslotsshallbeadoptedforprotectionandfireprotectionmeasuresshallbeadoptedforsuchmetalconduitsorclosedmetalslots;whereflame-retardantorfire-proofcablesareadoptedandlaidincableshaftandtrench,protectionbythreadinginmetalconduitsorclosedmetalslots;wheremineralinsulationtypenon-combustiblecablesareadopted,thelinesmaybedirectlylaidinanexposedway.2Wherelayingisconductedinaconcealedway,pipesshallbeadoptedandlaidinthenon-combustiblestructurewithprotectionlayerthicknessnotlessthan30mm;3Thefire-fightingdistributionlinesshouldbelaidseparatelyfromotherdistributionlinesindifferentcableshaftsortrench;wheretheymustbelaidinthesamecableshaftortrench,theyshallbearrangedindifferentside.Moreover,mineralinsulationtypenon-combustiblecablesshallbeadoptedforfire-fightingdistributionlines.10.2PowerLineandElectricEquipment10.2.1ThesmallesthorizontaldistancebetweentheoverheadpowerlineandCategoriesAandBfactorybuildings(storages),stackingofcombustibles,ClassesA,BandCliquidtanks,LPGtanksorcombustibleandcombustion-supportinggastanksshallbeinaccordancewiththosespecifiedinTable10.2.1.Thesmallesthorizontaldistancebetween35kVoraboveoverheadpowerlineandtheLPGtanks(tankfarm)withsingletankvolumegreaterthan200m3ortotalvolumegreaterthan1,000m3shallnotbelessthan40m.94\nTable10.2.1SmallestHorizontalDistancebetweenOverheadPowerLineandCategoriesAandBFactoryBuildings(Storages)orStackingofCombustibles(m)NameOverheadpowerlineCategoriesAandBfactorybuildings(storages);stackingofcombustibles;ClassesA,Bliquidtanks;LPGtanks,combustibleand1.5timesoftheheightofpowerpole(tower)combustion-supportinggastanks0.75timesoftheheightofpowerpoleDirectly-buriedClassesAandBliquidtanksandcombustiblegastanks(tower)ClassCliquidtanks1.2timesoftheheightofpowerpole(tower)Directly-buriedClassCliquidtanks0.6timesoftheheightofpowerpole(tower)10.2.2ThepowercablesshallnotbelaidinthesamepipetrenchwithClassesA,B,Cfluidpipelines,combustiblegaspipelinesandheatingpipelines.10.2.3Thedistributionlinesmustnotpassthroughtheinnercavityofventilatingpipelinesorbelaidintheexternalwallofventilatingpipelines;thedistributionlinesthreadedinmetalpipesmaybelaidcloselyclingingtotheexternalwallofventilatingpipelines.Wherethedistributionlinesarelaidinblindceilingorsuspendedceilingwithcombustibles,fireprotectionmeasuressuchasthreadinginmetalpipeorusingclosedmetalslotshallbeadopted.10.2.4Whereswitches,socketsandlightingfixturesareclosetothecombustibles,fireprotectionmeasures,suchasheatinsulationandheatdissipationmeasures,shallbetaken.Asfortheceilinglamp,recessedlampandembeddedlampoftungstenhalogenlamporincandescentlampwitharatedpowerofnotlessthan100W,non-combustiblematerialssuchasporcelainpipeandmineralwoolshallbeadoptedfortheheatinsulationoftheirleadingwires.Theincandescentlamp,tungstenhalidelamp,highvoltagesodiumlamp,metalhalidelampandfluorescenthigh-voltagemercurylamp(includinginductiveballast)withratedpowernotlessthan60Wshallnotbedirectlymountedontothecombustibles,orotherfirecontrolmeasuresshallbetaken.10.2.5Lowtemperaturelightingfixturesshouldbeappliedwithincombustiblesstorages,andheatinsulationandotherfireprotectionmeasureshallbetakenfortheheatingelementsoflightingfixtures;hightemperaturelightingfixturessuchastungstenhalidelampshallnotbeused.Distributionboxandswitchshallbearrangedoutsidethestorages.10.2.6Thedesignofelectricalinstallationsinexplosiveatmospheresshallmeettherequirementsofthecurrentnationalstandard"CodeforDesignofElectricalInstallationsinExplosiveAtmospheres"(GB50058).10.2.7Electricfiremonitorsystemshouldbearrangedforthenon-firepowerloadinthefollowingbuildingsorlocations:1CategoriesBandCfactorybuildingsandCategoryCstorageswithheighthigherthan50m;factorybuildings(storages)withoutdoorfiredemandgreaterthan30L/s;2CategoryIhigh-risecivilbuildings;3Cinemasandtheaterswithmorethan1,500seats,gymnasiumswithmorethan3,000seats,storesandexhibitionbuildingswiththebuildingareaofanyfloorgreaterthan3,000m2,broadcast&television,telecommunication,financeandtradebuildingsatprovincial95\n(municipal)levelorabove,otherpublicbuildingswithoutdoorfiredemandgreaterthan25L/s;4Keyhistoricbuildingsofbrick-woodortimberstructureofcountry-levelculturalrelicprotectionunits.10.3FireEmergencyLightingandEvacuationIndicatingSign10.3.1Exceptfortheresidentialbuildingswithaheightlessthan27m,evacuationlightingshallbearrangedatthefollowingpositionsofcivilbuildings,factorybuildingsandCategoryCstorages:1Enclosedstaircase,smoke-proofstaircaseanditsfrontroom,frontroomorsharedfrontroomoffireelevatorroom,exitpassagewayandrefugefloor(room);2Crowdedlocationssuchasauditorium,exhibitionhall,multi-functionhallaswellasbusinesshall,canteenandstudiowithbuildingareagreaterthan200m2;3Publicplacesofundergroundorsemi-undergroundwithbuildingareagreaterthan100m2;4Evacuationpassagewayinpublicbuildings;5Productionsitesandevacuationpassagewayincrowdedfactorybuildings.10.3.2Theminimumfloorhorizontalilluminationofevacuationlightingwithinbuildingsshallmeetthefollowingrequirements:1Asfortheevacuationpassageway,theminimumfloorhorizontalilluminationshallnotbelessthan1.0lx.2Asforcrowdedlocationsandrefugefloor(room),theminimumfloorhorizontalilluminationshallnotbelessthan3.0lx;asforrefugeroomofinpatientbuildingsoroperationdepartments,theminimumfloorhorizontalilluminationshallnotbelessthan10.0lx.3Asforthestaircase,frontroom(sharedfrontroom)andexitpassageway,theminimumfloorhorizontalilluminationshallnotbelessthan5.0lx.10.3.3Stand-bylightingshallbearrangedforfirecontrolroom,firepumproom,housegeneratorroom,powerdistributionroom,smokecontrol/exhaustmachineroomandfire-fightingequipmentroomwhichneednormaloperationincaseoffire,theminimumilluminationontheworkingplaneshallnotbelessthanthenormallightingillumination.10.3.4Evacuationlightingfixturesshallbearrangedonthetopofexit,theupperpartofwallsurfaceortheceiling;thestand-bylightingfixturesshallbearrangedontheupperpartofwallsurfaceortheceiling.10.3.5Lightingandevacuationindicatingsignsshallbearrangedinpublicbuildings,residentialbuildingswithheightgreaterthan54m,high-risefactorybuildings(storerooms)andCategoriesA,BandCsingle-/multi-storeyfactorybuildings,andshallmeetthefollowingrequirements:1Itshallbearrangedrightabovethesafetyexitandtheevacuationdoorofcrowdedlocations.2Itshallbearrangedinthewallsurfaceoftheevacuationpassagewayandthecorner,atapositionlessthan1.0mfromthegroundorontheground.Thespacingbetweenlighting96\nandevacuationindicatingsignsshallnotbegreaterthan20m;suchspacingshallnotbegreaterthan10mfordeadendwhilenotbegreaterthan1.0mforthecornerofpassageway.10.3.6Lightingandevacuationindicatingsignorlight-storingevacuationindicatingsigntoensurethevisualcontinuityshallbeaddedtotheflooroftheevacuationpassagewayandmainevacuationroutewithinthefollowingbuildingsorlocations:1Exhibitionbuildingswithtotalbuildingarealargerthan8,000m2;2Overgroundstoreswithtotalbuildingarealargerthan5,000m2;3Undergroundorsemi-undergroundstoreswithtotalbuildingarealargerthan500m2;4Entertainmentvenuesforsinging,dancingandbroadcasting;5Cinemasortheaterswithmorethan1,500seatsaswellasgymnasiums,assemblyhallsorauditoriumswithmorethan3,000seats;6Waitingroomswithbuildingareagreaterthan3,000m2inbusstation,wharfstructureandcivilairportterminalaswellaspublicareasinterminal.10.3.7Thefireevacuationindicatingsignandfireemergencylightingfixturesarrangedinbuildingsshallnotonlymeetthosespecifiedinthiscodebutalsomeettherequirementsofthecurrentnationalstandards"FireSafetySigns"(GB13495)and"FireEmergencyLightingandEvacuateIndicatingSystem"(GB17945).97\n11TimberBuildings11.0.1Thefireprotectiondesignoftimberbuildingsmaycomplywiththischapter.ThecombustionperformanceandfireresistanceratingofbuildingelementsshallbeinaccordancewiththosespecifiedinTable11.0.1.Table11.0.1CombustionPerformanceandFireResistanceRatingofTimberBuildingElementsCombustionperformanceandfireresistanceElementnamerating(h)FirewallNon-combustible3.00Load-bearingwall;wallsandseparatingwallsbetweenunitsofresidentialDifficult-combustible1.00buildings;wallsofstaircaseWallsofelevatorshaftNon-combustible1.00Non-load-bearingexteriorwall;partitionwallsonbothsidesofevacuationDifficult-combustible0.75passagewayPartitionwallbetweenroomsDifficult-combustible0.50Load-bearingcolumnCombustible1.00BeamCombustible1.00FloorslabDifficult-combustible0.75Roofload-bearingelementsCombustible0.50EvacuationstairsDifficult-combustible0.50SuspendedceilingDifficult-combustible0.15Notes:1Unlessotherwisestatedinthiscode,whenatimberbuildinghasroofsofdifferentheight,combustibleelementsshallnotbeadoptedfortheroofload-bearingelementsandroofsofthelowerpart,andifthedifficult-combustibleroofload-bearingelementsareadopted,theirfireresistanceratingshallnotbelessthan0.75h.2Asfortheroofoflighttimberbuilding,allpartsotherthanthewaterprooflayer,insulationlayerandroofslabshallberegardedasroofload-bearingelementsandshallnotadoptcombustibleelements,andthefireresistanceratingshallnotbelessthan0.50h.3Whenthenumberofstoreysislessthanorequalto2andthebuildingareaandlengthbetweenfirewallsarelessthan600m2and60mrespectively,thecombustionperformanceandfireresistanceratingofbuildingelementsmaybedeterminedaccordingtotherequirementsforsuchbuildingswithClassIVfireresistanceasspecifiedinthiscode.11.0.2Ifthepartitionswithtimberframeworkareadoptedforbuildings,thefollowingrequirementsshallbemet:1Asforresidentialbuildingsnothigherthan18m,officebuildingsnothigherthan24mandCategoriesDandEfactorybuildings(storerooms),thepartitionwallsbetweenroomsandthenon-load-bearingexteriorwallsmayadoptthepartitionswithtimberframework,andthenon-load-bearingexteriorwallsofotherbuildingsshallnotadoptpartitionswithtimberframework;2ThecombustionperformanceofwallfillingmaterialsshallbeClassA;3ThecombustionperformanceandfireresistanceratingofpartitionswithtimberframeworkshallbeinaccordancewiththosespecifiedinTable11.0.2,andotherrequirementsshallmeetthosespecifiedinthecurrentnationalstandard"TechnicalCodeforPartitionswith98\nTimberFramework"(GB/T50361).Table11.0.2CombustionPerformanceandFireResistanceRating(h)ofPartitionswithTimberFrameworkFireresistanceratingortypeofbuildingsElementnameClassIClassIIClassIIITimberbuildingsClassIVNon-load-bearingDifficult-combustibleDifficult-combustibleDifficult-combustibleNotallowedNorequirementexteriorwall1.250.750.75PartitionwallDifficult-combustibleDifficult-combustibleDifficult-combustibleDifficult-combustibleDifficult-combustiblebetweenrooms1.000.750.500.500.2511.0.3TimberbuildingsortimbercombinedbuildingsshallnotbeadoptedforCategoriesA,BandCfactorybuildings(storerooms).WhentimberbuildingsortimbercombinedbuildingsareadoptedforCategoriesDandEfactorybuildings(storerooms)andcivilbuildings,theirpermissiblenumberofstoreysandbuildingheightshallbeinaccordancewiththosespecifiedinTable11.0.3-1,andthepermissiblebuildinglengthandthemaximumpermissiblebuildingareaofeachfloorbetweenfirewallsintimberbuildingsshallbeinaccordancewiththosespecifiedinTable11.0.3-2.Table11.0.3-1PermissibleNumberofStoreysandPermissibleBuildingHeightofTimberBuildingsorTimberCombinedBuildingsOrdinarytimberLighttimberGluedtimberTimbercombinedTypeoftimberbuildingsbuildingbuildingbuildingbuildingPermissiblenumberofstoreys(storey)23137Permissiblebuildingheight(m)1010Notlimited1524Table11.0.3-2PermissibleBuildingsLengthandMaximumPermissibleBuildingAreaofEachFloorbetweenFireWallsofTimberBuildingsNumberofstoreysPermissiblebuildinglengthbetweenfireMaximumpermissiblebuildingareaofeachfloorbetween(storey)walls(m)firewalls(m2)11001,800280900360600Notes:1Whensprinklersystemisset,thepermissiblebuildinglengthandmaximumpermissiblebuildingareaofeachfloorbetweenfirewallsmaybeincreasedby1.0timesaccordingtothosespecifiedinthistable;asforCategoriesDandEovergroundfactorybuildings,themaximumpermissiblebuildingareaofeachfloorbetweenfirewallsisnotlimited.2Forthelargespacebuildingslikesportsvenues,thebuildingheightandareamaybeincreasedproperly.11.0.4Iftheaccommodationpartofseniorcitizenbuildingsandthechildrenroomsandactivityplacesinnurseriesandkindergartensarearrangedinthetimberbuildings,theyshallbearrangedonthefirstorsecondfloor.Single-storytimberbuildingshallbeadoptedforstores,gymnasiumsandCategoriesDandEfactorybuildings(storerooms).11.0.5Excepttheresidentialbuildings,thearrangementandfireprotectionrequirementsofthegeneratorrooms,powerdistributionroomsandboilerhousesinbuildingsshallmeettherequirementsof5.4.12~5.4.15and6.2.3~6.2.6ofthiscode.11.0.6Forthemobilegarage,generatorroom,powerdistributionroomandboilerhousearrangedintimberresidentialbuildings,theyshallbeseparatedfromotherpartswithfire99\npartitionwallsandnon-combustiblefloorslabswithfireresistanceratingnotlessthan2.00hand1.00hrespectively,andtheyshouldnotbesetwithdoors,windowsoropeningsleadingtotherooms;iftheymustbeopened,onesingle-leafClassBfiredoornotdirectlyleadingtothebedroomcanbeopened.Thebuildingareaofmobilegarageshouldnotbegreaterthan60m2.11.0.7Thesafeevacuationdesignofciviltimberbuildingsshallmeetthefollowingrequirements:1Thearrangementforsafetyexitsandroomevacuationdoorsofbuildingsshallmeettherequirementsof5.5inthiscode.Ifthebuildingareaofeachflooroftimberbuildingislessthan200m2andthesumofpopulationonthesecondandthirdfloorsisnotgreaterthan25,oneevacuationstairmaybebuilt.2ThelineardistancebetweentheevacuationdoordirectlyleadingtheroomtoevacuationpassagewayandthenearestsafetyexitshallnotbegreaterthanthosespecifiedinTable11.0.7-1.Table11.0.7-1LinearDistancebetweenEvacuationDoorDirectlyLeadingtheRoomtoEvacuationPassagewayandtheNearestSafetyExit(m)EvacuationdoorlocatedbetweenEvacuationdoorlocatedatbothsidesorNametwosafetyexitsterminalsofdeadendNursery,kindergartenandseniorcitizen1510buildingSinginganddancingentertainmentand156showvenuesHospitalandsanatoriumbuildingsand2512teachingbuildingsOthercivilbuildings30153ThelineardistancebetweenanypointintheroomandtheevacuationdoordirectlyleadingthisroomtoevacuationpassagewayshallnotbegreaterthanthatbetweentheevacuationdoorlocatedatbothsidesorterminalsofdeadendandthenearestsafetyexitspecifiedinTable11.0.7-1.4Theclearwidthoftheevacuationpassageway,safetyexit,evacuationstairandroomevacuationdoorinbuildingsshallbedeterminedthroughcalculationbasedonthenumberofevacueesaccordingtothattheminimumclearwidthforevacuationofevery100personsisnotlessthanthatspecifiedinTable11.0.7-2.Table11.0.7-2MinimumClearEvacuationWidthforEvery100PersonsofEvacuationPassageway,SafetyExit,EvacuationStairandRoomEvacuationDoor(m/100Persons)The1sthand2ndfloorsNumberofstoreysThe3rdfloorovergroundovergroundClearevacuationwidthforevery100persons(m/100persons)0.751.0011.0.8TheevacuationdistancesfromanypointinCategoriesDandEtimberfactorybuildingstothenearestsafetyexitsshallnotbegreaterthan50mand60mrespectively,andothersafeevacuationrequirementsshallmeetthosespecifiedin3.7ofthiscode.11.0.9Whenthepipelineandelectriccircuitarelaidinwallorthroughfloorslaborwall,thefireprotectionmeasuresshallbetaken,andthegapsbetweenthemandwallorfloorslabshallbefilledfirmlywithfirestopmaterials.Fireprotectionandheatinsulationmeasuresshallbetakenforopenflameorhigh100\ntemperaturepositionsandoil-fumeexhaustpipesofkitchensinresidentialbuildings.11.0.10ThefireseparationdistancebetweenciviltimberbuildingsorbetweenciviltimberbuildingandothercivilbuildingsshallnotbelessthanthatspecifiedinTable11.0.10.Thefireseparationdistancebetweenciviltimberbuildingsandfactorybuildings(storages)orthelike,betweentimberfactorybuildings(storages)orbetweentimberfactorybuildings(storages)andothercivilbuildingsshallmeettherequirementsonbuildingswithClassIVfireresistanceclassasstatedinChapters3and4ofthiscode.Table11.0.10FireSeparationDistance(m)betweenCivilTimberBuildingsaswellasbetweenCivilTimberBuildingsandOtherCivilBuildingsFireresistanceclassorcategoryofClassesIandIIClassIIITimberbuildingsClassIVbuildingsTimberbuildings891011Notes:1Ifthereisnodoor,windoworopeningontheexteriorwallsbetweentwotimberbuildingsorbetweentimberbuildingandothercivilbuildings,thefireseparationdistancemaybesetas4m;ifthedoor,windowandopeningontheexteriorwallarenotoveragainsteachotherandthetotalopeningareaisnotlargerthan10%ofexteriorwallarea,thefireseparationdistancemaybereducedby25%accordingtothosespecifiedinthistable.2Ifoneoftheadjacentexteriorwallsisfirewall,orafirewallissetbetweenbuildingswiththewallbodycuttingoffthenon-combustibleroofortoweringabovethedifficult-combustibleorcombustibleroofbynotlessthan0.5m,thefireseparationisnotlimited.11.0.11Fireseparationmeasuresshallbetakenforwall,floorslab,enclosedsuspendedceilingorenclosedspaceunderroofofthetimberbuildingswithhorizontalseparatinglengthorwidthnotgreaterthan20m,buildingareanotgreaterthan300m2andtheverticalseparatingheightofwallnotgreaterthan3m.Fireseparationmeasuresshallbetakenatthestairbeamofeachfloorinlighttimberbuildings.11.0.12Whentimberbuildingsareconstructedincombinationwithothersteel,reinforcedconcreteormasonrystructures,thefollowingrequirementsshallbemet:1Thetimberpartshallnotexceed3storeysandshallbearrangedattheupperpartofthebuildingincaseofverticalcombinedconstruction;non-combustiblefloorslabwithfireresistanceratingnotlessthan1.00hshouldbeadoptedtoseparatetimberpartfromotherparts.Firewallshouldbeadoptedtoseparatetimberpartfromotherpartsincaseofhorizontalcombinedconstruction.2IfthefireseparationismadebetweenthetimberpartandotherpartsaccordingtotherequirementsofItem1,thefireprotectiondesignoftimberpartandotherpartsshallrespectivelymeettherequirementsfortimberbuildingsandotherbuildingsinthiscode;underotherconditions,thefireprotectiondesignofbuildingsshallmeettherequirementsfortimberbuildingsasspecifiedinthiscode.3Theindoorfirewatersupplyshallbedeterminedaccordingtotheoverallheight,volume,storeysandpurposeofthebuildingaswellastherequirementsofChapter8inthiscodeandthecurrentrelevantstandardsofthenation;theoutdoorfirewatersupplyshallbedeterminedaccordingtorequirementsforbuildingswithClassIVfireresistanceclassas101\nspecifiedinthiscode.11.0.13Forthetimberpublicbuildingswithtotalbuildingarealargerthan1,500m2,thefirealarmsystemshallbeinstalled,andinthetimberresidentialbuildings,thefiredetectionandalarmdevicesshallbeinstalled.11.0.14OtherfireprotectiondesignoftimberbuildingsshallmeettherequirementsforbuildingswithClassIVfireresistanceclassasspecifiedinthiscode;therequirementsforfireproofconstructionshallmeettherequirementsofthiscodeandthecurrentnationalstandard"CodeforDesignofTimberStructures"(GB50005).102\n12CityRoadTunnel12.1GeneralRequirements12.1.1Asforthefireprotectiondesignofcityroadtunnel(hereinafterreferredtoastunnel),thetrafficcompositionintunnelaswellasthefunction,naturalconditionsandlengthofthetunnelshallbecomprehensivelyconsidered.12.1.2Single-boreandtwin-boretunnelsshallbedividedintoCategoriesI,II,IIIandIVaccordingtotheirenclosedlengthandtrafficsituations,andshallmeetthosespecifiedinTable12.1.2.Table12.1.2CategorizationofSingle-boreandTwin-boreTunnelsCategoryICategoryIICategoryIIICategoryIVFunctionTheenclosedlengthoftunnelL(m)AllowingmotorvehicleswithdangerouschemicalstopassL>1,5005003,0001,5001,500L≤1,50012.1.3Thefireresistanceratingofload-bearingstructureofthetunnelshallmeetthefollowingrequirements:1AsforCategoriesIandIItunnelsaswellasCategoryIIItunnelsallowingmotorvehiclestopass,thedeterminationofthefireresistanceratingoftheirload-bearingstructuresshallmeetthosespecifiedinAppendixCofthiscode;asforCategoriesIandIItunnels,RABTstandardtemperature-risecurvespecifiedinC.0.1inAppendixCofthiscodeshallbeadoptedasthefiretemperature-risecurve,andthefireresistanceratingshallnotbelessthan2.00hand1.50hrespectively;asforCategoryIIItunnelsallowingmotorvehiclestopass,HCstandardtemperature-risecurvespecifiedinC.0.1inAppendixCofthiscodeshallbeadoptedasthefiretemperature-risecurve,andthefireresistanceratingshallnotbelessthan2.00h.2Asfortunnelsofothercategories,thedeterminationofthefireresistanceratingoftheirload-bearingstructuresshallmeettherequirementsofthecurrentnationalstandard"Fire-resistanceTests-ElementsofBuildingConstruction-Part1:GeneralRequirements"(GB/T9978.1);asforCategoryIIItunnels,thefireresistanceratingshallnotbelessthan2.00h;asforCategoryIVtunnels,thefireresistanceratingisnotlimited.12.1.4Thefireresistanceclassofundergroundequipmentrooms,airshafts,firerescueexitsandentrancesintunnelsshallbeClassI;thefireresistanceclassofthegroundimportantequipmentrooms,operationandmanagementcentersaswellasothergroundauxiliaryroomsshallnotbeinferiortoClassII.12.1.5Exceptthejointmaterials,non-combustiblematerialsshallbeadoptedfortheinternaldecorationoftunnels.12.1.6Asforthetwin-boretunnelsallowingmotorvehiclestopass,thearrangementofcrossaislesorevacuationpassagewaysforvehiclesshallmeetthefollowingrequirements:1Crossaisleorevacuationpassagewayforvehiclesshouldbearrangedinthesubaqueoustunnels;thespacingbetweenthecrossaislesforvehiclesandthatbetweenthe103\ntunnelandtheentranceofevacuationpassagewayforvehiclesshouldbe1,000m~1,500m.2Crossaisleorevacuationpassagewayforvehiclesshallbearrangedinthenon-subaqueoustunnels;thespacingbetweenthecrossaislesforvehiclesandthatbetweenthetunnelandtheentranceofevacuationpassagewayforvehiclesshouldnotbegreaterthan1,000m.3Thecrossaisleforvehiclesshallbearrangedindirectionperpendiculartothetunnellengthandleadtotheadjacenttunnel;theevacuationpassagewayforvehiclesshallbearrangedbetweenthetwoboresindirectionperpendiculartothetunnellengthanddirectlyleadtotheoutsideofthetunnel.4Asforthecrossaisleandevacuationpassagewayforvehicles,theclearwidthshallnotbelessthan4.0mandtheclearheightshallnotbelessthan4.5m.5Fireseparationmeasuresshallbetakenatthejointsoftunnelsandcrossaislesorevacuationpassagewaysforvehicles.12.1.7Crossaisleorevacuationpassagewayforpedestriansshallbearrangedintwin-boretunnelandshallmeetthefollowingrequirements:1Thespacingbetweencrossaislesforpedestriansandthatbetweenthetunnelandtheentranceoftheevacuationpassagewayforpedestriansshouldbe250m~300m.2Thecrossaisleforpedestriansshallbearrangedindirectionperpendiculartothetwin-boretunnellengthandleadtotheadjacenttunnel;theevacuationpassagewayforpedestriansshallbearrangedbetweenthetwoboresindirectionperpendiculartothetunnellengthanddirectlyleadtotheoutsideofthetunnel.3Thecrossaislesforvehiclesmaybeusedforpedestrians.4Asforthecrossaisleorevacuationpassagewayforpedestrians,theclearwidthshallnotbelessthan1.2mandtheclearheightshallnotbelessthan2.1m.5Fireseparationmeasuresshallbetakenatthejointsoftunnelsandcrossaisleorevacuationpassagewayforpedestrians,andClassBfiredoorsshallbeadopted.12.1.8Refugefacilitiessuchaspersonnelevacuationexitdirectlyleadingtooutdoorsorseparatedrefugeshouldbearrangedinsingle-boretunnels.12.1.9Fireseparationmeasuresshallbetakentoseparatethesubstation,piperack,specializedevacuationpassageway,ventilationhouseandotherauxiliaryroomsinthetunnelfromthevehicletunnelswithfireseparationwallswithfireresistanceratingnotlessthan2.00haswellasClassBfiredoors.12.1.10Themaximumpermissiblebuildingareaofeachfirecompartmentofundergroundequipmentroominthetunnelshallnotbegreaterthan1,500m2;thenumberofsafetyexitsofeachfirecompartmentshallnotbelessthan2;theexitsleadingtolanesorotherfirecompartmentsmaybeusedasthesecondarysafetyexits,butatleastonesafetyexitdirectlyleadingtooutdoorsmustbearranged.Asforunmannedequipmentroomwithbuildingareanotgreaterthan500m2,onesafetyexitdirectlyleadingtooutdoorsmaybearranged.12.2FireWaterSupplyandFireExtinguishingEquipment12.2.1Duringurbantrafficplanninganddesign,firewatersupplysystemshallalsobedesigned.CategoryIVtunnelsaswellastheCategoryIIItunnelsallowingpedestriansornon-motorvehiclestopassmaynotbesetwithfirewatersupplysystem.104\n12.2.2Thearrangementoffirewatersupplysystemshallmeetthefollowingrequirements:1Thefirewatersourceandwatersupplynetworkshallcomplywiththerelevantcurrentstandardsofthenation.2Thefiredemandshallbedeterminedthroughcalculationaccordingtothefiredurationintunnelandthesituationthatthefulltunnelisinvolvedinafireatthesametime.ThefiredurationofCategoriesIandIItunnelsshallnotbelessthan3.0h,andthatofCategoryIIItunnelsshallnotbelessthan2.0h.3Thefiredemandintunnelshallbecalculatedaccordingtothetotalwaterconsumptionwhenallfireextinguishingequipmentarestarted.4Independentfirewatersupplysystemshouldbearrangedinthetunnel.Anti-freezingmeasuresshallbetakenforfirewatersupplypipelinesandoutdoorfirehydrantsinseverecoldandcoldzones;whendry-typewatersupplysystemisadopted,automaticairvalveshallbeinstalledonthehighestpositionofpipenetworkandthefillingtimeofpipelineshouldnotbegreaterthan90s.5Thewaterdemandoffirehydrantsinsidetunnelshallnotbelessthan20L/s;andthatoffirehydrantoutsidethetunnelshallnotbelessthan30L/s.AsforCategoryIIItunnelswithlengthlessthan1,000m,thewaterdemandoffirehydrantsinsideandoutsidethetunnelmaybe10L/sand20L/srespectively.6Asforthefirewatersupplypressureinpipeline,itshallguaranteethatthefullwaterspoutofwatergunatthemostunfavorablepointshallnotbelessthan10.0mwhenthewaterdemandreachesthemaximumvalue;whentheoutflowpressureatfirehydrantmouthisgreaterthan0.5MPa,pressure-reducingfacilitiesshallbeequipped.7Firepumpadaptersandoutdoorfirehydrantsshallbearrangedattheexitandentranceoftunnel.8Thespacingoffirehydrantsintunnelshallnotbegreaterthan50m;theheightoffirehydrantmouthabovethegroundshouldbe1.1m.9Asfortunnelswithwatersupplyfacilitiesasfirepumps,thestartbuttonoffirepumpshallbearrangedinthehydrantcabinet.10Indoorfirehydrantcabinetsshallbearrangedononesideofthetunnel;firehydrantcabinetshallbeequippedwithawatergunwiththediameterofjetholeof19mm,adiscofwaterhosewithlengthof25manddiameterof65mm,andfirehosereel.12.2.3Drainagefacilitiesshallbearrangedintunnelwiththeconsiderationofdischargingseepedwater,rainwaterandtunnelcleaningwateraswellasthefiredemand,andmeasurestopreventcombustibleorharmfulliquidsfromflowingalongthetunnelduringanaccidentshallbetaken.12.2.4ABCfireextinguishersshallbeequippedintunnelandshallmeetthefollowingrequirements:1AsforCategoriesIandIItunnelsallowingmotorvehiclestopassaswellasCategoryIIItunnelsallowingmotorvehicletopassandbeingarrangedwith3ormorelanes,fireextinguishersshallbeequippedonbothsidesofthetunnel,andthenumberoffireextinguishersateachsetpointshallnotbelessthan4;2Asforothertunnels,fireextinguishersmaybeequippedononeside,andthenumberoffireextinguishersateachsetpointshallnotbelessthan2;3Thespacingofpointsequippedwithfireextinguishersshallnotbegreaterthan105\n100m.12.3VentilatingandSmokeExhaustSystem12.3.1SmokeexhaustfacilitiesshallbearrangedforCategoriesI,IIandIIItunnelsallowingmotorvehiclestopass.12.3.2Thearrangementofmechanicalsmokeexhaustsysteminthetunnelshallmeetthefollowingrequirements:1Longitudinalsegmentsmokeexhaustorkeypointsmokeexhaustshouldbeadoptedfortunnelswithlengthgreaterthan3,000m;2Asforsingle-boreone-waytraffictunnelswithlengthnotgreaterthan3,000m,thelongitudinalsmokeexhaustshouldbeadopted;3Asforsingle-boretwo-waytraffictunnels,thekeypointsmokeexhaustshouldbeadopted.12.3.3Mechanicalsmokeexhaustsystemandventilatingsystemoftunnelshouldbearrangedseparately.Wheretheyareusedtogether,theventilatingsystemshallbepossessedofquickswitchingfunctionduringafireandshallmeettherequirementsofmechanicalsmokeexhaustsystem.12.3.4Themechanicalsmokeexhaustsystemarrangedintunnelshallmeetthefollowingrequirements:1Iftransverseandsemi-transverseventilationmodesareadopted,smokemaybeexhaustedthroughexhaustduct.2Iflongitudinalsmokeexhaustmodeisadopted,itshallbeabletorapidlyorganizeairflowandeffectivelyexhaustsmoke;itssmokeexhaustvelocityshallbedeterminedaccordingtothescaleofthemostunfavorablefire,andthelongitudinalairflowspeedshallnotbelessthan2m/sandshallbegreaterthanthecriticalwindspeed.3Thesmokeexhaustersaswellasauxiliaryequipmentsuchasairvalves,silencers,softjointsflowedbysmokeshallbeabletobearthedesignedfiresmokeexhausttemperatureofthetunnelandkeepconsecutivenormaloperationfornolessthan1.0hat250℃.Thefireresistanceratingofsmokeexhaustpipelineshallnotbelessthan1.00h.12.3.5Independentmechanicalpressurizedairsupplysystemshallbesetintherefugefacilitiesoftunnel,thereoftheresidualpressurevalueofairsupplyshallbe30Pa~50Pa.12.3.6Atleastasetofstandbyjetfanshallbeequippedinthetunnelforfiresmokeexhaust.12.4FireAlarmSystem12.4.1Alarmsignaldevicesshallbearrangedatposition100m~150mtothetunnelentrancetowarn"noentrance"forvehicleswhenthereisafireinthetunnel.12.4.2FirealarmsystemshallbesetforCategoriesIandIItunnelsandshouldbearrangedforCategoryIIItunnelsallowingmotorvehiclestopass.Thearrangementoffirealarmsystemshallmeetthefollowingrequirements:1Fireautomaticdetectiondevicesshallbeequipped;2Alarmtelephonesandalarmbuttonsshallbearrangedatthetunnelexitandentrance106\naswellasevery100m~150minthetunnel;3Fireemergencybroadcastshallbearrangedorluminousalarmdevicesshallbearrangedevery100m~150m.12.4.3Firealarmsystemshallbearrangedintunnelcablechannelsandmainequipmentrooms.12.4.4Facilitiesguaranteeingsmoothcommunicationduringfireextinguishmentsuchaswirelesscommunicationshallbeequippedforsuchtunnelswhereshieldingmaybegenerated.12.4.5Tunnelswithenclosedlengthexceeding1,000mshouldbearrangedwithfirecontrolroom;thebuildingfireprotectionrequirementsoffirecontrolroomshallmeetthosespecifiedin8.1.7and8.1.8ofthiscode.Thedesignoffirealarmsysteminthetunnelshallmeettherequirementsofthecurrentnationalstandard"CodeforDesignofAutomaticFireAlarmSystem"(GB50116).12.5PowerSupplyandOtherRequirements12.5.1ThepowerutilizationforfireprotectionofCategoriesIandIItunnelsshallbesuppliedaccordingtotherequirementsofClassIload;thepowerutilizationforfireprotectionofCategoryIIItunnelsshallbesuppliedaccordingtotherequirementsofClassIIload.12.5.2Otherrequirementsoffireprotectionpoweraswellasitspowersupplyandpowerdistributionlinesoftunnelshallmeetthosespecifiedin10.1ofthiscode.12.5.3Evacuationlightingandevacuationindicatingsignsshallbearrangedonbothsidesofthetunnelaswellasabovethecrossaislesandevacuationpassagewayforpedestrians,andtheirheightshouldnotbegreaterthan1.5m.ThecontinuouspowersupplytimeofevacuationlightingandevacuationindicatingsignsinCategoriesIandIItunnelsshallnotbelessthan1.5hwhilethatforothertunnelsshallnotbelessthan1.0h.Moreover,otherrequirementsmaybedeterminedaccordingtothosespecifiedinChapter10ofthiscode.12.5.4Itisstrictlyforbiddentoarrangecombustiblegaspipelineinthetunnel;thecabletrunkingshallbelaidseparatelyfromotherpipelines.Wherehigh-voltagecableof10kVoraboveisarranged,firecompartmentwithfireresistanceratingnotlessthan2.00hshallbeadoptedtoseparateitfromotherareas.12.5.5Protectionmeasuresadaptingtotheenvironmentalconditionsinthetunnelshallbeadoptedforallfire-fightingfacilitiesarrangedinthetunnel;moreover,theyshallbesetwithvisibleluminousindicatingsigns.107\nAppendixACalculationMethodofBuildingHeightandStoreysA.0.1Thecalculationofbuildingheightshallmeetthefollowingrequirements:1Thebuildingheightshallbetheaverageheightfromoutdoordesigngroundtothecorniceandroofridgeofthebuildingwhenthebuildingroofisaslopingroof.2Thebuildingheightshallbetheheightfromoutdoordesigngroundtotheroofcoveringofthebuildingwhenthebuildingroofisaflatroof(includingflatroofwithparapetwall).3Whenabuildinghasmultiformroofs,thebuildingheightshallbetakenasthelargestoneamongvaluesrespectivelycalculatedaccordingtoabovemethods.4Asforstep-typeterrace,whenfirewallsarearrangedforseparatinginabuildinglocatedontheterraceofdifferentelevationsandarerespectivelysetwithsafetyexitsmeetingtherequirementsofthespecifications,andthethroughorstub-endfirelanemaybearrangedalongthetwolongsidesofthebuilding,therespectivebuildingheightmaybecalculatedrespectively.Otherwise,thebuildingheightshallbedeterminedaccordingtothelargestheightvalue.5Theauxiliaryroomssuchasthewatchtower,coolingtower,watertankroomsandmicrowaveantennaroomspartiallyprotrudingoutofthebuildingrooforthefacilitiesandelevatormachinerooms,airexhaustandsmokeexhaustroomsaswellasthestairexitcubicles,accountingforlessthan1/4oftheroofarea,maynotcountedinthebuildingheight.6Asfortheresidentialbuildings,thebicyclegarages,thestoreroomsandopenspacesarrangedatthebottomandwiththeindoorheightnotgreaterthan2.2m,andthepartsofbuildingwheretheinteriorandexteriorheightdifferenceisnotgreaterthan1.5mortheheightfromtheroofdeckofbasementorsemi-basementofthebuildingtotheoutdoordesigngroundisnotgreaterthan1.5m,maynotbecountedinthebuildingheight.A.0.2Thebuildingstoreysshallbecalculatedaccordingtothenaturalstoreysofthebuilding,andthefollowingspacesmaynotbecountedinthebuildingstoreys:1Basementandsemi-basementwithindoorroofdeckabovetheoutdoordesigngroundbylessthanorequalto1.5m;2Thebicyclegarages,storeroomsoropenspacesarrangedatthebottomofbuildingandwithindoorheightnotgreaterthan2.2m;3Thepartialequipmentroomsandstaircasesofbuildingsprotrudingoutofthebuildingroof.108\nAppendixBCalculationMethodofFireSeparationDistanceB.0.1Thefireseparationdistancebetweenbuildingsshallbecalculatedaccordingtothesmallesthorizontaldistancebetweenexteriorwallsofadjacentbuildings;incaseofprotrudingcombustibleordifficult-combustibleelementsontheexteriorwall,thefireseparationdistanceshallbecalculatedstartingfromtheouteredgeofprotrudingparts.Thefireseparationdistancefrombuildingstostoragetanksandstackyardsshallbethesmallesthorizontaldistancefromtheexteriorwallofbuildingtotheouterwallofstoragetanksortheouteredgesofadjacentstacksinthestackyard.B.0.2Thefireseparationdistancebetweenstoragetanksshallbethesmallesthorizontaldistancebetweentheouterwallsoftwoadjacentstoragetanks.Thefireseparationdistancebetweenstoragetankandstackyardshallbethesmallesthorizontaldistancefromtheouterwallofstoragetanktotheouteredgeofadjacentstacksinthestackyard.B.0.3Thefireseparationdistancesbetweenstackyardsshallbethesmallesthorizontaldistancesbetweentheouteredgesofadjacentstacksintwostackyards.B.0.4Thefireseparationdistancebetweentransformersshallbethesmallesthorizontaldistancebetweentheouterwallsofadjacenttransformers.Thefireseparationdistancefromtransformerstobuildings,storagetanksorstackyardsshallbethesmallesthorizontaldistancefromtheouterwalloftransformertotheexteriorwallofbuilding,outerwallofstoragetankortheouteredgeofadjacentstacks.B.0.5Thefireseparationdistancefrombuildings,storagetanksorstackyardstotheroadsandrailwaysshallbethesmallesthorizontaldistancefromtheexteriorwallofbuilding,outerwallofstoragetankortheouteredgeofadjacentstackstothenearestroadsideofroadorthecenterlineofrailway.109\nAppendixCTemperature-riseCurveforFireResistanceRatingTestandPerformanceCriteriaofLoad-bearingStructureinTunnelC.0.1RABTandHCstandardtemperature-risecurvesshallmeettherequirementsofthecurrentnationalstandard"FireResistanceTestforElementsofBuildingConstruction-AlternativeandAdditionalProcedures"(GB/T26784).C.0.2Performancecriteriaoffireresistanceratingshallmeetthefollowingrequirements1WhenHCstandardtemperature-risecurveisadoptedfortest,thejudgmentcriteriaofthefireresistanceratingshallbe:afterfireexposure,whenthetemperatureofsteelbars25mmawayfromtheconcretebottomsurfaceisgreaterthan250℃,orthetemperatureofconcretesurfaceisgreaterthan380℃,itisjudgedashavingreachedthefireresistancerating.2WhenRABTstandardtemperature-risecurveisadoptedfortest,thejudgmentcriteriaofthefireresistanceratingshallbe:afterfireexposure,whenthetemperatureofsteelbars25mmawayfromtheconcretebottomsurfaceisgreaterthan300℃,orthetemperatureofconcretesurfaceisgreaterthan380℃,itisjudgedashavingreachedthefireresistancerating.110\nExplanationofWordinginThisCode1Wordsusedfordifferentdegreesofstrictnessareexplainedasfollowsinordertomarkthedifferencesinimplementingtherequirementsinthiscode.1)Wordsdenotingaverystrictormandatoryrequirement:“Must”isusedforaffirmation;“mustnot”fornegation.2)Wordsdenotingastrictrequirementundernormalconditions:“Shall”isusedforaffirmation;“shallnot”fornegation.3)Wordsdenotingapermissionofaslightchoiceoranindicationofthemostsuitablechoicewhenconditionspermit:“Should”isusedforaffirmation;“shouldnot”fornegation.4)“May”isusedtoexpresstheoptionavailable,sometimeswiththeconditionalpermit.2“Shallcomplywith...”or“shallmeettherequirementsof...”isusedinprovisionstoindicatethatitisnecessarytocomplywiththerequirementsstipulatedinotherrelativestandards.111\nListofQuotedStandardsCodeforDesignofTimberStructuresGB50005CodeforDesignofCityGasEngineeringGB50028CodeforDesignofBoilerPlantGB50041CodeforDesignElectricPowerSupplySystemsGB50052CodeforDesignofElectricalInstallationsinExplosiveAtmospheresGB50058CodeforDesignofColdStoreGB50072CodeforDesignofOilDepotGB50074CodeofDesignforSprinklerSystemsGB50084CodeforDesignofAutomaticFireAlarmSystemGB50116CodeforDesignandConstructionofAutomobileGasolineandGasGB50156FillingStationCodeforDesignofFireProtectionforFossilFuelPowerPlantsandGB50229SubstationsCodeforDesignofGrainSteelSilosGB50322TechnicalCodeforPartitionswithTimberFrameworkGB/T50361ResidentialBuildingCodeGB50368TechnicalCodeforMedicalGasesEngineeringGB50751CodeofDesignonFireProtectionWaterSupplyandHydrantSystemsGB50974FireResistanceTests-DoorandShutterAssembliesGB/T7633Fire-resistanceTests-ElementsofBuildingConstruction-Part1:GB/T9978.1GeneralRequirementsFireResistantDoorsetsGB12955FireSafetySignsGB13495FireResistantShutterGB14102FireDampersforBuildingVentingandSmoke-ventingSystemGB15930FireResistantWindowsGB16809FireEmergencyLightingandEvacuateIndicatingSystemGB17945GeneralTechnicalRequirementsforFireControlCenterGB25506FireResistanceTestforElementsofBuildingConstruction-AlternativeGB/T26784andAdditionalProceduresFireResistanceTestforLiftLandingDoors-MethodsofMeasuringGB/T27903Integrity,ThermalInsulationandHeatFlux112