Designation:C1249−06a(Reapproved2010)StandardGuideforSecondarySealforSealedInsulatingGlassUnitsforStructuralSealantGlazingApplications1ThisstandardisissuedunderthefixeddesignationC1249;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidecoversdesignandfabricationconsiderationsfortheedgesealofconventionallysealedinsulatingglassunits,hereinreferredtoasIGunits.TheIGunitsdescribedareusedinstructuralsiliconesealantglazingsystems,hereinreferredtoasSSGsystems.SSGsystemstypicallyareeithertwoorfoursided,glazedwithastructuralsealant.Otherconditionssuchasone,three,five,sixsidedmaybeused.1.2ThisguidesdoesnotcovertheIGunitsofotherthanconventionaledgesealdesign(Fig.1);however,theinforma-tioncontainedhereinmaybeofbenefittothedesignersofsuchIGunits.1.3InanSSGsystem,IGunitsareretainedtoametalframingsystembyastructuralseal(Fig.2).Thesizeandshapeofthatseal,aswellasnumerousotherSSGsystemdesignconsiderations,arenotaddressedinthisguide.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.6Thecommitteewithjurisdictionforthisstandardisnotawareofanycomparablestandardguidespublishedbyotherorganizations.2.ReferencedDocuments2.1ASTMStandards:2C639TestMethodforRheological(Flow)PropertiesofElastomericSealantsC679TestMethodforTack-FreeTimeofElastomericSeal-antsC717TerminologyofBuildingSealsandSealantsC794TestMethodforAdhesion-in-PeelofElastomericJointSealantsC1087TestMethodforDeterminingCompatibilityofLiquid-AppliedSealantswithAccessoriesUsedinStruc-turalGlazingSystemsC1135TestMetho...
