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  • ASTM
    C844-04(2010) Standard Specification for Application of Gypsum Base to Receive Gypsum Veneer Plaster
    Edition: 2010
    $93.60
    Unlimited Users per year

Description of ASTM-C844 2010

ASTM C844 - 04(2010)

Standard Specification for Application of Gypsum Base to Receive Gypsum Veneer Plaster

Active Standard ASTM C844 | Developed by Subcommittee: C11.03

Book of Standards Volume: 04.01




ASTM C844

Abstract

This specification covers the minimum requirements for, and methods of, application of gypsum veneer base for gypsum veneer plasters. 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. The materials shall be classified as follows: gypsum base for veneer plasters; gypsum backing board for coreboard; special fire-retardant gypsum base; foil-backed gypsum base; gypsum veneer plaster; nails; non-load bearing steel; load bearing steel; steel framing, non-load bearing; accessories; adhesives; steel framing load bearing; and wood framing. The maximum spacing of framing members for singly gypsum base construction shall be not more than then specified values. Application of gypsum base, single-ply gypsum base, adhesive-mechanical fastener, foil-backed gypsum base, two-ply gypsum base, and application over existing surfaces shall be indicated. Solid gypsum base partitions shall include face ply, core, and runners. Direct adhesive application shall be used only on interior masonry or concrete walls above grade, or inside of exterior masonry cavity walls. Gypsum base application over steel framing and furring shall include screw application, framing space, and screw spacing. Gypsum base applied to the soffit of arches shall be carefully bent into place and shall conform to the specified values of bending radii.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification covers the minimum requirements for, and methods of, application of gypsum veneer base for gypsum veneer plasters.

1.2 Gypsum veneer base shall not be used as a base for direct adhesive application of ceramic, metal, or plastic tile in areas exposed to abnormal moisture or humidity or temperature.

1.3 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.

1.4 Where a specific degree of sound control is required for veneer plaster assemblies and constructions, details of construction shall be in accordance with official reports of tests conducted in recognized sound testing laboratories in accordance with the applicable sound tests, Test Method C423 , Test Method E90 , or Test Method E492 .

1.5 Where this specification is more stringent (size or thickness of framing; spacing of fasteners) than the fire-rated construction, this specification shall govern; otherwise, the construction described in the fire test report shall govern.

1.6 Unheated spaces above gypsum veneer base ceilings shall be properly ventilated (see Appendix X3).

1.7 The values stated in inch-pound units are to be regarded as the standard. The SI (metric) values given in parentheses are approximate and are provided for information purposes only.

1.8 The text of this standard 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 standard.


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

C423 Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method

C514 Specification for Nails for the Application of Gypsum Board

C587 Specification for Gypsum Veneer Plaster

C588/C588M Specification for Gypsum Base for Veneer Plasters

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

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

C1047 Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base

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

E90 Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements

E492 Test Method for Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using the Tapping Machine

American Softwood Lumber Standard

PS20 American Softwood Lumber Standard Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.

Keywords

electric heat cable; gypsum; gypsum base; veneer plastic; Gypsum plaster--specifications; Installation--gypsum products; Plaster--specifications;


ICS Code

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


DOI: 10.1520/C0844-04R10

ASTM International is a member of CrossRef.

ASTM C844

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