Designation:C842−05(Reapproved2015)StandardSpecificationforApplicationofInteriorGypsumPlaster1ThisstandardisissuedunderthefixeddesignationC842;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverstheminimumrequirementsforfull-thickness(inaccordancewithTable1)interiorgypsumplasteringongypsum,metal,masonry,ormonolithicconcretebasesdesignedorpreparedtoreceivegypsumplaster.1.1.1Gypsumplasterappliedtotheinteriorsideofexteriorwallsofmasonryorconcreteshallbeisolatedfromtheexteriorwall.1.2Gypsumplastersshallnotbeusedinexteriorlocationsorinterior“wet”areas.NOTE1—Tosecuredesirableresults,thisspecificationshouldbecoordinatedwiththeprovisionsofSpecificationC841.Generalinforma-tionconcerningfullthicknessgypsumplasteringiscontainedinAnnexA2,AnnexA3,andAnnexA4.1.3Detailsofconstructionforaspecificassemblytoachievetherequiredfireresistanceshallbeobtainedfromreportsoffire-resistancetests,engineeringevaluations,orlistingsfromrecognizedfiretestinglaboratories.1.4Detailsofconstructiontoachieverequiredsoundcon-trolshallbeobtainedfromreportsoftestsconductedatrecognizedsoundtestinglaboratoriesinaccordancewiththeapplicablesoundtestsofTestMethodsE90,C423,orE492.1.5Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSI(metric)valuesgiveninparenthesesareapproximateandareprovidedforinformationpurposesonly.1.6Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.2.ReferencedDocuments2.1ASTMStandards:2C5SpecificationforQuicklimeforStructuralPurposesC11TerminologyRelatingtoGypsumandRelatedBuildingMaterialsandSystemsC28/C28MSpecificationforGypsumPlastersC35SpecificationforInorganicAggregatesforUseinGyp-sumPlasterC59/C59...
