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【英文标准名称】:StandardPracticeforEvaluatingElevatedTemperaturePerformanceofEnd-JointedLumberStuds
【原文标准名称】:端拼木螺栓高温性能评价的标准实施规程
【标准号】:ASTMD7470-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D07.02
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:adhesive;end-joint;end-jointedlumber;qualification
【摘要】:End-jointedlumberstudsusedinfireresistance-ratedassembliesshallbeabletosupportthesuperimposeddesignloadforthespecifiedtimeunderanelevatedtemperatureexposure,whenawallassemblyisexposedtoastandardfirespecifiedinTestMethodsE119.Light-weightwoodassembliesutilizegypsumwallboardorothertypesofmembraneprotectiontoaccomplisharequisitefireresistanceratingfortheassembly.However,woodstudsandtheend-jointsinthestudsshallresistthedevelopedelevatedtemperatureenvironmentforthedurationoftherating.Thispracticeprovidesamethodforevaluatingtheelevatedtemperatureperformanceofanassemblyconstructedwithend-jointedstudshavingfireperformancecomparabletoanassemblyconstructedwithsolid-sawnstuds.1.1Thispracticeistobeusedtoevaluatetheelevatedtemperatureperformanceofend-jointedlumberstuds.1.2Asymmetricwallassemblycontainingend-jointedlumberstudsisexposedtoastandardfireexposurespecifiedinTestMethodsE119.1.3End-jointedlumberstudsaredeemedqualifiedifthewallassemblyresistsastandardfireexposurespecifiedinTestMethodsE119foraperiodof60minormore.Qualificationofend-jointedlumberstudsarerestrictedtothejointconfigurationandadhesivetested.1.4Thispracticeisusedtoevaluatetheperformanceofend-jointedlumberstudstoheatandflameundercontrolledconditions,butdoesnotbyitselfincorporateallfactorsrequiredforfirehazardorfireriskassessmentunderactualfireconditions.1.5Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:J13
【国际标准分类号】:91_080_20
【页数】:3P.;A4
【正文语种】:英语