ASTM C1280-04

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Designation: C 1280 – 04
Standard Specification for
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Application of Gypsum Sheathing
This standard is issued under the fixed designation C 1280; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
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1.1 This specification covers the minimum requirements for 2.1 ASTM Standards:
and methods of application of gypsum sheathing for use as a C 11 Terminology Relating to Gypsum and Related Build-
substrate for exterior wall cladding. ing Materials and Systems
1.2 Details of construction for a specific assembly to C 79/C 79M Specification for Gypsum Sheathing Board
achieve the required fire resistance shall be obtained from C 954 Specification for Steel Drill Screws for the Applica-
reports of fire-resistance tests, engineering evaluations, or tion of Gypsum Panel Products or Metal Plaster Bases to
listings from recognized fire testing laboratories. Steel Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84
1.2.1 This specification shall govern where it is more mm) in Thickness
stringent (size or thickness of framing and size and spacing of C 955 Specification for Load-Bearing (Transverse and
fasteners) than the fire-rated construction. Axial) Steel Studs, Runners (Tracks), and Bracing or
1.3 Where sound control is required for a gypsum sheathing Bridging for ScrewApplication of Gypsum Panel Products
assembly, the details of construction shall be in accordance and Metal Plaster Bases
with the acoustical test report of an assembly that has met the C 1002 Specification for Steel Self-Piercing Tapping
required acoustical value(s). Screws for the Application of Gypsum Panel Products or
1.3.1 This specification shall govern where it is more Metal Plaster Bases to Wood Studs or Steel Studs
stringent (size or thickness of framing and size and spacing of C 1007 Specification for the Installation of Load Bearing
fasteners) than the sound-rated construction. (Transverse and Axial) Steel Studs and Related Accesso-
1.4 Where resistance to racking loads or shear is required ries
for a gypsum sheathing assembly, the details of construction C 1063 Specification for Installation of Lathing and Furring
shall be in accordance with the racking or shear test report of to Receive Interior and Exterior Portland Cement-Based
anassemblythathasmettherequiredrackingorshearvalue(s). Plaster
1.4.1 This specification shall govern where it is more 2.2 U.S. Department of Commerce Publication:
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stringent (size or thickness of framing and size and spacing of PS20 American Softwood Lumber Standard
fasteners) than the racking or shear-tested construction.
3. Terminology
1.5 The values stated in inch-pound units are to be regarded
as the standard.The SI (metric) values given in parentheses are 3.1 Definitions: Definitions shall be in accordance with
Terminology C 11.
approximate and are provided for information purposes only.
1.6 The text of this standard references footnotes which 3.2 Definitions of Terms Specific to This Standard:
3.2.1 exterior cladding, n—a permanent material or system
provide explanatory material. These footnotes shall not be
considered as requirements of the standard. that impedes the transmission of environmental elements to the
sheathing.
1.7 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 3.2.2 fastener, n—nails, staples, or screws used for applica-
tion of the sheathing.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 3.2.3 framing member, n—studs, headers, bracing, and
blocking that serve to receive the sheathing.
bility of regulatory limitations prior to use.
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This specification is under the jurisdiction of ASTM Committee C11 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Gypsum and Related Building Materials and Systems and is the direct responsibility contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
of Subcommittee C11.03 on Specifications for Application of Gypsum and Other Standards volume information, refer to the standard’s Document Summary page on
Products in Assemblies. the ASTM website.
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Current edition approved May 1, 2004. Published June 2004. Originally Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
approved in 1994. Last previous edition approved in 1999 as C 1280 - 99. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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