【英文标准名称】:StandardTestMethodforDeterminingIgnitibilityofExteriorWallAssembliesUsingaRadiantHeatEnergySource
【原文标准名称】:使用辐射热能源的外墙组件的可燃性测量的标准试验方法
【标准号】:ANSI/NFPA268-2011
【标准状态】:现行
【国别】:美国
【发布日期】:2011-01-01
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Construction;Exteriorwalls;Radiantheat;Safetyengineering
【摘要】:1.1Scope.1.1.1Thisfiretestresponsestandarddescribesamethodfordeterminingthepropensityofignitionofexteriorwallassembliesfromexposureto12.5kW/m2(1.10Btu/ft2-sec)radiantheatinthepresenceofapilotignitionsource.1.1.2Thistestmethodevaluatesthepropensityofignitionofanexteriorwallassemblywheresubjectedtoaminimumradiantheatfluxof12.5kW/m2(1.10Btu/ft2-sec).Thismethoddetermineswhetherignitionofanexteriorwallassemblyoccurswhenthewallisexposedtoaspecifiedradiantheatflux,inthepresenceofapilotignitionsource,duringa20-minuteperiod.1.1.3Thistestmethodutilizesagas-firedradiantpaneltoapplyaradiantheatfluxof12.5kW/m2(1.10Btu/ft2-sec)toarepresentativesampleofanexteriorwallassemblywhilethetestspecimenisexposedsimultaneouslytoapilotignitionsource.1.1.4Thistestmethodappliestoexteriorwallassemblieshavingplanar,ornearlyplanar,externalsurfaces.1.1.4.1Thismethodshallnotbeusedtoevaluatethefireenduranceofwallassemblies,norshallitbeusedtoevaluatetheeffectoffiresoriginatingwithinthebuildingorwithintheexteriorwallassemblies.1.1.4.2Thismethodshallnotbeusedtoevaluatesurfaceflamespread,norshallitbeusedtoevaluatetheinfluenceofopeningsfortheirpropensityofignition.
【中国标准分类号】:P16
【国际标准分类号】:13_220_50;91_060_10
【页数】:
【正文语种】:英语