Designation:C1705/C1705M−09(Reapproved2016)StandardSpecificationforStructuralCementitiousPanels1ThisstandardisissuedunderthefixeddesignationC1705/C1705M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversstructuralcementitiouspanels.Structuralcementitiouspanelsarenon-combustible,waterdurable,fiberreinforcedinorganiccompositepanelsintendedforuseasstructuralpanels.Structuralcementitiouspanelscanbeusedasfloor,roofandwallsheathingwhenfastenedtosupportsspacedinaccordancewiththeappropriatespanrating.1.2Thisspecificationdefinesminimumperformancere-quirementsforstructuralcementitioussheathingpanelswithrespecttostructuralperformance,dimensionalstabilityperformance,dimensionaltolerance,noncombustibility,sur-faceburningcharacteristics,long-termdurability,waterdurability,moldresistance,density,momentcapacityandbendingstiffness.1.3Thisspecificationalsodefinesapolicytoassureon-goingproductqualitybydetectingchangesinpanelpropertiesthatmayadverselyaffectpanelperformance.Requiredauditsofqualityactivitiesbyathirdpartyqualityassuranceagencyarealsodefined.1.4Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C1185TestMethodsforSamplingandTestingNon-AsbestosFiber-CementFlatSheet,RoofingandSidingShingles,andClapboardsC1704...
