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ASTM C840-08

Historical Revision

Standard Specification for Application and Finishing of Gypsum Board

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1.1 This specification covers the minimum requirements for the methods of application and finishing of gypsum board, including related items and accessories.

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 Where this specification is more stringent (size or thickness of framing: size and spacing of fasteners) than the fire-rated construction, this specification shall govern.

1.3 Where sound control is required for a gypsum board assembly, details of construction shall be in accordance with reports of acoustical tests of assemblies that have met the required acoustical values.

1.4 Unheated spaces above gypsum board ceilings shall be properly ventilated (seeAppendix X2).

1.5 The various application systems are located in the following sections:

I Application of Single-Ply Gypsum Board to Wood Framing
Members
8
II Application of Two-Ply Gypsum Board to Wood Framing
Members
9
III Application of Gypsum Board by Adhesive Nail-On to
Wood Framing Members
10
IV Semi-Solid Gypsum Board Partitions11
V Solid Gypsum Board Partitions12
VI Application of Gypsum Board with Adhesives to Interior
Masonry or Concrete Walls
13
VII Application of Gypsum Board to Rigid Foam Insulation14
VIII Application of Gypsum Board to Steel Framing and Furring15
IX Arches and Bending Radii16
X Application of Gypsum Board to Receive Tile by
Adhesive Application
17
XI Exterior Application of Gypsum Wallboard and
Exterior Gypsum Soffit Board
18
XII Floating Interior Angles19
XIII Control (Expansion) Joints20
XIV Foil-Backed Gypsum Board21


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 specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.

1.7 The following precautionary caveat pertains only to Sections 6-24. 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.

1.7.1 For specific precautionary statements, see 4.1.1, 4.1.2, and 22.5.


This specification covers requirements for the methods of application and finishing of gypsum board. Construction details 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. Gypsum board assembly shall conform to acoustical tests of the specification where sound control is required. Moreover, gypsum assembly shall conform to framing size, fasteners spacing, ventilation, substrate, surface preparation, cutting, and installation application as indicated in the specification. Materials categorized under this specification include: gypsum boards, gypsum wallboards, gypsum backing board and coreboard, water-resistant gypsum backing board, exterior gypsum soffit board, and gypsum ceiling board. Finishing materials include: compounds, joint tape, fasteners, nails, screws, and staples. A fire test of assemblies shall be conducted to determine a fire resistance rating required for gypsum board assembly. Gypsum board shall be cut by scoring and breaking or by sawing, working from the face side. Masonry or concrete walls shall be dry, free of dust, oil, or form release agents, protrusions or voids, or foreign matter that inhibit bond for adhesively applied gypsum board. All materials shall be kept dry. Where gypsum board is stored outside, it shall be off the ground, properly supported on a level platform and fully protected from the weather or direct sunlight exposure.


SDO ASTM: ASTM International
Document Number C840
Publication Date May 1, 2008
Language en - English
Page Count 19
Revision Level 08
Supercedes
Committee C11.03
Publish Date Document Id Type View
Nov. 1, 2024 C0840-24 Revision
Oct. 1, 2023 C0840-23 Revision
May 1, 2020 C0840-20 Revision
Nov. 1, 2019 C0840-19B Revision
Oct. 1, 2019 C0840-19A Revision
June 1, 2019 C0840-19 Revision
Nov. 15, 2018 C0840-18B Revision
Oct. 1, 2018 C0840-18A Revision
July 1, 2018 C0840-18 Revision
Oct. 1, 2017 C0840-17A Revision
April 1, 2017 C0840-17 Revision
Sept. 1, 2016 C0840-16 Revision
Dec. 1, 2013 C0840-13 Revision
Dec. 1, 2011 C0840-11 Revision
May 1, 2008 C0840-08 Revision
Jan. 1, 2007 C0840-07 Revision
June 1, 2006 C0840-06 Revision
Dec. 1, 2005 C0840-05 Revision
Dec. 1, 2004 C0840-04A Revision
Jan. 1, 2004 C0840-04 Revision
June 10, 2003 C0840-03 Revision
Dec. 10, 2002 C0840-02 Revision
May 10, 2001 C0840-99 Revision
May 10, 2001 C0840-01 Revision
May 10, 2001 C0840-00 Revision
Not Available C0840-79 Revision