Designation:C843−17StandardSpecificationforApplicationofGypsumVeneerPlaster1ThisstandardisissuedunderthefixeddesignationC843;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationcoverstheminimumrequirementsforandmethodsofapplyinggypsumveneerplaster.1.2Whereaspecificdegreeoffireresistanceisrequiredforveneerplastersystems,applicablebuildingcoderegulationsshallbefollowed.1.2.1Detailsofconstructionforaspecificassemblytoachievetherequiredfireresistanceshallbeobtainedfromreportsoffire-resistancetests,engineeringevaluations,orlistingsfromrecognizedfiretestinglaboratories.1.3Whereaspecificdegreeofsoundcontrolisrequiredforveneerplasterassembliesandconstructions,detailsofcon-structionshallbeincompliancewithofficialreportsoftestsconductedinrecognizedsoundtestinglaboratoriesinaccor-dancewiththeapplicablesoundtestsofTestMethodsE90,C423,orE492.NOTE1—Toensuredesirableresults,coordinatethisspecificationwithSpecificationC844.NOTE2—GeneralinformationregardingmattersofacontractualnatureconcerningveneerplasterworkisfoundinAppendixX1.AdditionaltechnicalinformationrelatedtoveneerplasteringisprovidedinAppendixX2.1.4Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thetextofthisspecificationreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthespecification.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TB...
