Designation:C636/C636M−19StandardPracticeforInstallationofMetalCeilingSuspensionSystemsforAcousticalTileandLay-InPanels1ThisstandardisissuedunderthefixeddesignationC636/C636M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoverstheinstallationofsuspensionsys-temsforacousticaltileandlay-inpanels.Itisapplicabletocontractorswhoseservicesareutilizedforinstallingacousticalceilingsandtoothertradesiftheiractivitiesareresponsibleforinterferencewithceilingcomponentsorperformanceasde-finedinthisrecommendedpractice.1.2Whilethepracticesdescribedinthisdocumenthaveequalapplicationtofire-resistivesuspensionsystems,manysystemsimposeadditionalrequirementstoobtainthefireenduranceclassificationofparticularfloor-ceilingorroof-ceilingassemblies.Thesedetailsareavailablefromthelistingagencyandfromthemanufacturers.1.3Similarly,additionaldetailingisoftennecessarytomeetsoundattenuationrequirementswhenceilingplenumsextendovercontiguousrooms.Obtainthesefromthemanufactureroftheacousticalmaterialemployed.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsresultinnon-conformancewiththestandard.1.5Whilemanyofthepracticesdescribedinthispracticehaveapplicationtotheinstallationofmetalsuspensionsystemsinexteriorenvironments,thespecificdesignofexteriorceilinginstallationsrequiresthereviewandapprovalofthearchitectorengineer,orboth,whoareresponsiblefortheconstructionofthebuildingormodificationstoanexistingbuilding.Whilerecommendationsfromthemanufactureraresolicited,itre-mainsthefinalresponsibilityofthearchitect/engineertoensureproperapplicationofthematerialsinquestion.1.6Thisstandarddoesnotpurporttoaddre...
