Designation:E2574/E2574M−12aAnAmericanNationalStandardStandardTestMethodforFireTestingofSchoolBusSeatAssemblies1ThisstandardisissuedunderthefixeddesignationE2574/E2574M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisisafire-test-responsestandard.1.2Thistestmethodassessestheburningbehaviorofupholsteredseatingusedinschoolbusesbymeasuringspecificfire-testresponseswhenaschoolbusseatspecimenissub-jectedtoaspecifiedflamingignitionsourceundernormallyventilatedconditions.1.3Theignitionsourceisagasburner.1.4Thisfiretestisprimarilyusefultodistinguishproductsthat,whenexposedtoanignitionsource,willbecomefullyinvolvedinfirefromotherproductsthatwillnot.1.5Dataareobtaineddescribingtheburningbehavioroftheseatassembliesfromaspecificignitionsourceuntilallburninghasceased.1.6Thistestmethoddoesnotprovideinformationonthefireperformanceofupholsteredseatinginfireconditionsotherthanthoseconditionsspecified.1.7Theburningbehaviorisvisuallydocumentedbyphoto-graphicorvideorecordings,wheneverpossible.1.8ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.9Thisstandardisusedtomeasureanddescribetheresponseofmaterials,products,orassembliestoheatandflameundercontrolledconditions,butdoesnotbyitselfincorporateallfactorsrequiredforfirehazardorfireriskassessmentofthematerials,productsorassembliesunderactualfireconditions.1.10Firetestingisinherentlyhazardous.Adequatesafe-guardsforpersonnelandpropertyshallbeemployedinconductingthesetests.1.11Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardto...
