Designation:C725−90(Reapproved2014)StandardSpecificationforSemidenseMineralFiberSiding1ThisstandardisissuedunderthefixeddesignationC725;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoverssemidensemineralfibersiding(shingles,clapboards,andsheets)designedtoprovideprotec-tionfortheweather-exposedsidewallsurfacesofbuildings.Thesesidingsarenailablewithorwithoutprepunchedholes.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesstatedinparenthesesareprovidedforinformationonly.1.3Warning—Breathingofasbestosdustishazardous.Asbestosandasbestosproductspresentdemonstratedhealthrisksforusersandforthosewithwhomtheycomeintocontact.Inadditiontootherprecautions,whenworkingwithasbestos-cementproducts,minimizethedustthatresults.Forinforma-tiononthesafeuseofchrysoltileasbestos,referto“SafeUseofChrysotileAsbestos:AManualonPreventiveandControlMeasures.”21.4Thefollowingprecautionarycaveatpertainsonlytothetestmethodportion,Section9,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimita-tionspriortouse.Foraspecifichazardwarning,see1.3.2.ReferencedDocuments2.1ASTMStandards:3C460TerminologyforAsbestos-Cement(Withdrawn2001)4D1037TestMethodsforEvaluatingPropertiesofWood-BaseFiberandParticlePanelMaterials2.2FederalStandard:Fed.Std.No.123MarkingforShipment(CivilAgencies)52.3MilitaryStandard:MIL-STD-129MarkingforShipmentandStorage53.Classification3.1Semidensemineralfibersidingshallbeoneofthefollowingtypes,asspecified:3.1.1TypeI,Shingles—Uniformthickness,rectangularinshape,andhavingwavy,r...
