Designation:A755/A755M−16´1StandardSpecificationforSteelSheet,MetallicCoatedbytheHot-DipProcessandPrepaintedbytheCoil-CoatingProcessforExteriorExposedBuildingProducts1ThisstandardisissuedunderthefixeddesignationA755/A755M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.ε1NOTE—TextinNote3wascorrectededitoriallyinJune2016.1.Scope*1.1Thisspecificationcoverssteelsheetmetalliccoatedbythehot-dipprocessandcoil-coatedwithorganicfilmsforexteriorexposedbuildingproducts.Sheetofthisdesignationisfurnishedincoils,cutlengths,andformedcutlengths.Build-ingproductsincludecorrugatedandvarioustypesofrollandbrake-formedconfigurations.1.2Thesubstrateisavailableinseveraldifferentmetallic-coatedsteelsheetproductsasenumeratedin4.1,dependingontherequirementsofthepurchaser.1.3Coatingsystemssuppliedunderthisspecificationcon-sistofaprimercoatcoveredbyvarioustypesandthicknessesoftopcoats.Thecombinationofprimerandtopcoatisclassedaseitheratwo-coatthin-filmsystemorasatwo-coat(ormore)thick-filmsystem.Typicaltop-coatingmaterialsare:polyester,siliconepolyester,acrylic,fluoropolymer,plastisol,orpolyure-thane.1.4Thisspecificationisapplicabletoordersineitherinch-poundunits(asA755)orSIunits[asA755M].Valuesininch-poundunitsandSIunitsarenotnecessarilyequivalent.Withinthetext,SIunitsareshowninbrackets.Eachsystemshallbeusedindependentlyofeachother.1.5Unlesstheorderspecifiesthe“M”designation(SIunits)theproductshallbefurnishedtoinch-poundunits.1.6Thetextofthisspecificationreferencesnotesandfootnotesthatprovideexplanatorymaterial.Thesenotesandfootnotes,excludingthoseintablesandfigures,shallnotbeconsideredasrequirementsofthisspecification.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Iti...
