ASTM C1280-13a
(Specification)Standard Specification for Application of Exterior Gypsum Panel Products for Use as Sheathing
Standard Specification for Application of Exterior Gypsum Panel Products for Use as Sheathing
ABSTRACT
This specification covers the minimum requirements for and the methods of application of gypsum sheathing for use as a substrate for exterior wall cladding. Gypsum sheathing board is a substrate that shall be covered by an exterior cladding or other weather-resistive barrier and is not intended for long-term exposure. Framing members shall be installed so that the surface will be in an even plane, unless otherwise specified, after the gypsum sheathing has been applied. The gypsum sheathing shall be cut by scoring and breaking or by sawing, working from the face side. The cut edges and ends of gypsum sheathing shall be trimmed to obtain neat fitting joints when installed. Gypsum sheathing shall be fitted snugly around all window and door openings. Control joints, other accessories, and metal plaster base shall be fastened through gypsum sheathing to framing members. Where fire resistance or shear resistance is not required, and when metal lath and Portland cement plaster are to be applied as the exterior cladding over gypsum sheathing installed over framing members and the metal lath shall be installed after the gypsum sheathing, the gypsum sheathing shall be permitted to be applied and fastening of the gypsum sheathing shall be completed with the attachment of the self-furred metal lath.
SCOPE
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:C1280 −13a
Standard Specification for
Application of Exterior Gypsum Panel Products for Use as
1
Sheathing
This standard is issued under the fixed designation C1280; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 1.6 The text of this standard references notes which provide
explanatory material. These notes shall not be considered as
1.1 This specification covers the minimum requirements for
requirements of the standard.
and methods of application of exterior gypsum panel products
1.7 This standard does not purport to address all of the
that are specifically designed for use as a substrate for exterior
safety concerns, if any, associated with its use. It is the
cladding.
responsibility of the user of this standard to establish appro-
1.1.1 This specification does not cover gypsum panel prod-
priate safety and health practices and determine the applica-
ucts that are specifically designed for interior applications.
bility of regulatory limitations prior to use.
1.2 Details of construction for a specific assembly to
achieve the required fire resistance shall be obtained from
2. Referenced Documents
reports of fire-resistance tests, engineering evaluations, or
2
2.1 ASTM Standards:
listings from recognized fire testing laboratories.
C11 Terminology Relating to Gypsum and Related Building
1.2.1 This specification shall govern where it is more
Materials and Systems
stringent (size or thickness of framing and size and spacing of
C954 SpecificationforSteelDrillScrewsfortheApplication
fasteners) than the fire-rated construction.
of Gypsum Panel Products or Metal Plaster Bases to Steel
1.3 Where sound control is required for a gypsum panel
Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in
product assembly, the details of construction shall be in
Thickness
accordance with the acoustical test report of an assembly that
C955 Specification for Load-Bearing (Transverse andAxial)
has met the required acoustical value(s).
Steel Studs, Runners (Tracks), and Bracing or Bridging
1.3.1 This specification shall govern where it is more
for Screw Application of Gypsum Panel Products and
stringent (size or thickness of framing and size and spacing of
Metal Plaster Bases
fasteners) than the sound-rated construction.
C1002 Specification for Steel Self-Piercing Tapping Screws
for the Application of Gypsum Panel Products or Metal
1.4 Where resistance to racking loads or shear is required
Plaster Bases to Wood Studs or Steel Studs
for a gypsum panel product assembly, the details of construc-
C1007 Specification for Installation of Load Bearing (Trans-
tion shall be in accordance with the racking or shear test report
verse and Axial) Steel Studs and Related Accessories
of an assembly that has met the required racking or shear
C1063 Specification for Installation of Lathing and Furring
value(s).
to Receive Interior and Exterior Portland Cement-Based
1.4.1 This specification shall govern where it is more
Plaster
stringent (size or thickness of framing and size and spacing of
C1177/C1177M Specification for Glass Mat Gypsum Sub-
fasteners) than the racking or shear-tested construction.
strate for Use as Sheathing
1.5 The values stated in inch-pound units are to be regarded
C1278/C1278M Specification for Fiber-Reinforced Gypsum
as standard. The values given in parentheses are mathematical
Panel
conversions to SI units that are provided for information only
C1396/C1396M Specification for Gypsum Board
and are not considered standard.
2.2 U.S. Department of Commerce Publication:
3
PS20 American Softwood Lumber Standard
1
This specification is under the jurisdiction of ASTM Committee C11 on
2
Gypsum and Related Building Materials and Systems and is the direct responsibility For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ofSubcommitteeC11.03onSpecificationsfortheApplicationofGypsumandOther contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Products in Assemblies. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Nov. 15, 2013. Published January 2014. Originally the ASTM website.
3
approved in 1994. Last previous edition approved in 2013 as C1280 – 13. DOI: Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
10.1520/C1280-13A. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1280 − 13 C1280 − 13a
Standard Specification for
Application of Exterior Gypsum Panel Products for Use as
1
Sheathing
This standard is issued under the fixed designation C1280; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C954 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
C955 Specification for Load-Bearing (Transverse and Axial) Steel Studs, Runners (Tracks), and Bracing or Bridging for Screw
Application of Gypsum Panel Products and Metal Plaster Bases
C1002 Specification for Steel Self-Piercing Tapping Screws for the Application of Gypsum Panel Products or Metal Plaster
Bases to Wood Studs or Steel Studs
C1007 Specification for Installation of Load Bearing (Transverse and Axial) Steel Studs and Related Accessories
C1063 Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster
1
This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.03 on Specifications for the Application of Gypsum and Other Products in Assemblies.
Current edition approved Feb. 15, 2013Nov. 15, 2013. Published March 2013January 2014. Originally approved in 1994. Last previous edition approved in 20122013 as
C1280 – 12a.C1280 – 13. DOI: 10.1520/C1280-13.10.1520/C1280-13A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C1280 − 13a
C1177/C1177M Specificat
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