ASTM C840-08

    Standard Specification for Application and Finishing of Gypsum Board

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    1. Scope

    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
    II Application of Two-Ply Gypsum Board to Wood Framing
    III Application of Gypsum Board by Adhesive Nail-On to
    Wood Framing Members
    IV Semi-Solid Gypsum Board Partitions11
    V Solid Gypsum Board Partitions12
    VI Application of Gypsum Board with Adhesives to Interior
    Masonry or Concrete Walls
    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
    XI Exterior Application of Gypsum Wallboard and
    Exterior Gypsum Soffit Board
    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.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C11 Terminology Relating to Gypsum and Related Building Materials and Systems

    C475/C475M Specification for Joint Compound and Joint Tape for Finishing Gypsum Board

    C514 Specification for Nails for the Application of Gypsum Board

    C557 Specification for Adhesives for Fastening Gypsum Wallboard to Wood Framing

    C645 Specification for Nonstructural Steel Framing Members

    C754 Specification for Installation of Steel Framing Members to Receive Screw-Attached Gypsum Panel Products

    C920 Specification for Elastomeric Joint Sealants

    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

    C1002 Specification for Steel Self-Piercing Tapping Screws for 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

    C1047 Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base

    C1396/C1396M Specification for Gypsum Board

    C1546 Guide for Installation of Gypsum Products in Concealed Radiant Ceiling Heating Systems

    E2634 Specification for Flat Wall Insulating Concrete Form (ICF) Systems

    U.S. Department of Commerce Publication

    PS20 American Softwood Lumber Standard Available from U.S. Government Printing Office, Washington, DC 20402.

    ICS Code

    ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)

    Referencing This Standard
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    DOI: 10.1520/C0840-08

    Citation Format

    ASTM C840-08, Standard Specification for Application and Finishing of Gypsum Board, ASTM International, West Conshohocken, PA, 2008,

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