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ASTM C840, 2020 Edition, May 1, 2020 – Standard Specification for Application and Finishing of Gypsum Board
This specification covers the minimum requirements for the methods of application and finishing of gypsum board, including related items and accessories.
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.
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.
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.
Unheated spaces above gypsum board ceilings shall be properly ventilated (see Appendix X2).
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.
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.
The following precautionary caveat pertains only to Sections 6 – 26. 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.For specific precautionary statements, see 4.1.1, 4.1.2, and 24.5.
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.
*A Summary of Changes section appears at the end of this standard
Table of content ASTM c840 Pdf free download
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 (see Appendix 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 Partitions | 11 |
| V | Solid Gypsum Board Partitions | 12 |
| VI | Application of Gypsum Board with Adhesives to Interior Masonry or Concrete Walls | 13 |
| VII | Application of Gypsum Board to Rigid Foam Insulation | 14 |
| VIII | Application of Gypsum Board to Steel Framing and Furring | 15 |
| IX | Arches and Bending Radii | 16 |
| 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 Angles | 19 |
| XIII | Control (Expansion) Joints | 20 |
| XIV | Foil-backed Gypsum Board | 21 |
| XV | Application of Vinyl Faced Gypsum Board | 22 |
1.6 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.
1.7 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.
1.8 The following precautionary caveat pertains only to Sections 6 – 26. 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.
For specific precautionary statements, see 4.1.1, 4.1.2, and 24.5.
1.9 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.
2. Referenced Documents (purchase separately)
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
C955 Specification for Cold-Formed Steel Structural Framing Members
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 PublicationPS20 American Softwood Lumber Standard Available from U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://www.access.gpo.gov.
Keywords
Adhesives – Fasteners – Flammability – Frames – Gypsum – Gypsum Boards – Manufacturing Process – Walls And Wall Assemblies
ICS Code
ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)
UNSPSC Code
UNSPSC Code 30161509(Gypsum board)
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