Designation:D4990−97a(Reapproved2020)StandardSpecificationforCoal-TarGlassFeltUsedinRoofingandWaterproofing1ThisstandardisissuedunderthefixeddesignationD4990;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversglassfeltimpregnatedwithcoal-tarintendedtobeusedwithcoal-tarpitchconformingtotheappropriaterequirementsofSpecificationD450/D450Minconstructionofbuilt-uproofsandintheconstructionofwaterproofingsystems.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3ThefollowingsafetyhazardscaveatpertainsonlytotheTestMethodsportion,Section8,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafety,health,andenvironmentalpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D146/D146MTestMethodsforSamplingandTestingBitumen-SaturatedFeltsandWovenFabricsforRoofingandWaterproofingD450/D450MSpecificationforCoal-TarPitchUsedinRoofing,Dampproofing,andWaterproofingD1079TerminologyRelatingtoRoofingandWaterproofing3.Terminology3.1Definitions—Fordefinitionsoftermsusedinthisspecification,refertoTerminologyD1079.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1netdrymass—themassofthecoal-tar-impregnatedglassfeltexclusiveofwrappingandpackingmaterial,afterdryingtoconstantweightandafterremovingalldetachedcomminutedsurfacingmaterialasdescribedin...
