ASTM_C_1280_-_18.pdf

Designation:C128018Standard Specification forApplication of Exterior Gypsum Panel Products for Use asSheathing1This standard is issued under the fixed designation C1280;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers the minimum requirements forand methods of application of exterior gypsum panel productsthat are specifically designed for use as a substrate for exteriorcladding.1.1.1 This specification does not cover gypsum panel prod-ucts that are specifically designed for interior applications.1.2 Details of construction for a specific assembly toachieve the required fire resistance shall be obtained fromreports of fire-resistance tests,engineering evaluations,orlistings from recognized fire testing laboratories.1.2.1 This specification shall govern where it is morestringent(size or thickness of framing and size and spacing offasteners)than the fire-rated construction.1.3 Where sound control is required for a gypsum panelproduct assembly,the details of construction shall be inaccordance with the acoustical test report of an assembly thathas met the required acoustical value(s).1.3.1 This specification shall govern where it is morestringent(size or thickness of framing and size and spacing offasteners)than the sound-rated construction.1.4 Where resistance to racking loads or shear is requiredfor a gypsum panel product assembly,the details of construc-tion shall be in accordance with the racking or shear test reportof an assembly that has met the required racking or shearvalue(s).1.4.1 This specification shall govern where it is morestringent(size or thickness of framing and size and spacing offasteners)than the racking or shear-tested construction.1.5 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.6 The text of this standard references notes which provideexplanatory material.These notes shall not be considered asrequirements of the standard.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C11 Terminology Relating to Gypsum and Related BuildingMaterials and SystemsC954 Specification for Steel Drill Screws for theApplicationof Gypsum Panel Products or Metal Plaster Bases to SteelStuds from 0.033 in.(0.84 mm)to 0.112 in.(2.84 mm)inThicknessC955 Specification for Cold-Formed Steel Structural Fram-ing MembersC1002 Specification for Steel Self-Piercing Tapping Screwsfor Application of Gypsum Panel Products or MetalPlaster Bases to Wood Studs or Steel StudsC1007 Specification for Installation of Load Bearing(Trans-verse and Axial)Steel Studs and Related AccessoriesC1063 Specification for Installation of Lathing and Furringto Receive Interior and Exterior Portland Cement-BasedPlasterC1177/C1177M Specification for Glass Mat Gypsum Sub-strate for Use as SheathingC1278/C1278M Specification for Fiber-Reinforced GypsumPanel1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and is the direct responsibilityof Subcommittee C11.03 on Specifications for theApplication of Gypsum and OtherProducts in Assemblies.Current edition approved Nov.1,2018.Published December 2018.Originallyapproved in 1994.Last previous edition approved in 2013 as C1280 13a.DOI:10.1520/C1280-18.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 C1396/C1396M Specification for Gypsum Board2.2