1.1 This specification covers the minimum requirements for and methods of application of exterior gypsum panel products that are specifically designed for use as a substrate for exterior cladding.
1.1.1 This specification does not cover gypsum panel products that are specifically designed for interior applications.
1.2 Details of construction for a specific assembly to achieve the required fire resistance shall be obtained from reports of fire-resistance tests, engineering evaluations, or listings from recognized fire testing laboratories.
1.2.1 This specification shall govern where it is more stringent (size or thickness of framing and size and spacing of fasteners) than the fire-rated construction.
1.3 Where sound control is required for a gypsum panel product assembly, the details of construction shall be in accordance with the acoustical test report of an assembly that has met the required acoustical value(s).
1.3.1 This specification shall govern where it is more stringent (size or thickness of framing and size and spacing of fasteners) than the sound-rated construction.
1.4 Where resistance to racking loads or shear is required for a gypsum panel product assembly, the details of construction shall be in accordance with the racking or shear test report of an assembly that has met the required racking or shear value(s).
1.4.1 This specification shall govern where it is more stringent (size or thickness of framing and size and spacing of fasteners) than the racking or shear-tested construction.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.6 The text of this standard references notes which provide explanatory material. These notes shall not be considered as requirements of the standard.
1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM C1280-18 Referenced Document
ASTM C1002 Standard Specification for Steel Self-Piercing Tapping Screws for Application of Gypsum Panel Products or Metal Plaster Bases to Wood Studs or Steel Studs*, 2022-06-01 Update
ASTM C1007 Standard Specification for Installation of Load Bearing (Transverse and Axial) Steel Studs and Related Accessories*, 2020-05-01 Update
ASTM C1063 Standard Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster
ASTM C11 Standard Terminology Relating to Gypsum and Related Building Materials and Systems
ASTM C1177/C1177M Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing
ASTM C1278/C1278M Standard Specification for Fiber-Reinforced Gypsum Panel
ASTM C1396/C1396M Standard Specification for Gypsum Board*, 2024-04-21 Update
ASTM C954 Standard Specification for Steel Drill Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Steel Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in Thickness*, 2022-06-01 Update
ASTM C955 Standard Specification for Cold-Formed Steel Structural Framing Members
ASTM C1280-18 history
1970ASTM C1280-18(2023) Standard Specification for Application of Exterior Gypsum Panel Products for Use as Sheathing
2018ASTM C1280-18 Standard Specification for Application of Exterior Gypsum Panel Products for Use as Sheathing
2013ASTM C1280-13a Standard Specification for Application of Exterior Gypsum Panel Products for Use as Sheathing
2013ASTM C1280-13 Standard Specification for Application of Exterior Gypsum Panel Products for Use as Sheathing
2012ASTM C1280-12a Standard Specification for Application of Exterior Gypsum Panel Products for Use as Sheathing
2012ASTM C1280-12 Standard Specification for Application of Gypsum Sheathing
2011ASTM C1280-11 Standard Specification for Application of Gypsum Sheathing
2009ASTM C1280-09 Standard Specification for Application of Gypsum Sheathing
2007ASTM C1280-07 Standard Specification for Application of Gypsum Sheathing
2004ASTM C1280-04 Standard Specification for Application of Gypsum Sheathing
1999ASTM C1280-99 Standard Specification for Application of Gypsum Sheathing