ASTM C442/C442M-01

Standard Specification for Gypsum Backing Board, Gypsum Coreboard, and Gypsum Shaftliner Board

SCOPE
1.1 This specification covers gypsum board designed to be used as a base in multilayer systems, as a gypsum stud or core in semi-solid or solid gypsum board partitions, or in shaftwall assemblies.
Note 1--Specification C840 contains application procedures for gypsum backing board, gypsum coreboard, and gypsum shaftliner board.
1.2 The values stated in inch-pound units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system shal be used independent of the other. Values from the two systems shall not be combined.
1.3 The terms "backing board," "coreboard," and "shaftliner board," refer to different end uses of the gypsum board specified in this specification. The term "gypsum backing board," in this specification, shall include gypsum coreboard and gypsum shaftliner board unless otherwise stated.
1.4 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.

General Information

• Status: Historical
• Publication Date: 09-Jun-2001
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C11 - Gypsum and Related Building Materials and Systems
• Drafting Committee: C11.01 - Specifications and Test Methods for Gypsum Products

Relations

• Replaces: ASTM C442/C442M-99a - Standard Specification for Gypsum Backing Board, Gypsum Coreboard, and Gypsum Shaftliner Board
• Effective Date: 10-Jun-2001
• Replaced By: ASTM C442/C442M-04 - Standard Specification for Gypsum Backing Board, Gypsum Coreboard, and Gypsum Shaftliner Board
• Effective Date: 01-Jan-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation: C 442/C 442M – 01
Standard Specification for
Gypsum Backing Board, Gypsum Coreboard, and Gypsum
1
Shaftliner Board
This standard is issued under the fixed designation C 442/C 442M; 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.
This standard has been approved for use by agencies of the Department of Defense.
2
1. Scope* and Storage of Gypsum Board
E84 Test Method for Surface Burning Characteristics of
1.1 This specification covers gypsum board designed to be
3
Building Materials
used as a base in multilayer systems, as a gypsum stud or core
E96 Test Methods for Water Vapor Transmission of Mate-
in semi-solid or solid gypsum board partitions, or in shaftwall
4
rials
assemblies.
E119 Test Methods for Fire Tests of Building Construction
NOTE 1—Specification C 840C 840 contains application procedures for 3
and Materials
gypsum backing board, gypsum coreboard, and gypsum shaftliner board.
3. Terminology
1.2 The values stated in inch-pound units are to be regarded
as standard. Within the text, the SI units are shown in brackets.
3.1 Definitions—Definitions of terms shall be in accordance
The values stated in each system shal be used independent of
with Terminology C 11C11.
the other. Values from the two systems shall not be combined.
3.2 Definitions of Terms Specific to This Standard:
1 5
1.3 Theterms“backingboard,”“coreboard,”and“shaftliner
3.2.1 gypsum backing board, n—a ⁄4 to ⁄8-in. [6.4 to
board,” refer to different end uses of the gypsum board
15.9-mm] gypsum board used as a backing for gypsum
specified in this specification. The term “gypsum backing
wallboard, acoustical tile, or other dry cladding.
3
board,” in this specification, shall include gypsum coreboard
3.2.2 gypsum coreboard, n—a ⁄4 or 1-in. [19.0 to 25.4-mm]
and gypsum shaftliner board unless otherwise stated.
gypsum board used as a gypsum stud or core in semisolid or
1.4 The text of this specification references notes and
solid gypsum board partitions.
3
footnotes which provide explanatory material. These notes and
3.2.3 gypsum shaftliner board, n—a ⁄4 or 1-in. [19.0 or
footnotes (excluding those in tables and figures) shall not be
25.4-mm] gypsum board used in shaftwall assemblies.
considered as requirements of the specification.
4. Materials and Manufacture
2. Referenced Documents
4.1 Gypsum backing board shall consist of a noncombus-
2.1 ASTM Standards:
tible core, essentially gypsum, surfaced with paper bonded to
C11 Terminology Relating to Gypsum and Related Build-
the core.
2
3
ing Materials and Systems
4.2 Gypsum coreboard is a single ⁄4-in. [19.0-mm] or 1-in.
2
C36 Specification for Gypsum Wallboard
[25.4-mm] thick board or is composed of two factory lami-
3
C 473 Test Methods for Physical Testing of Gypsum Panel
nated boards to provide ⁄4-in. [19.0-mm] or 1-in. [25.4-mm]
2
Products
total nominal thickness.
3
C 645 Specification for Non-Load Bearing (Axial) Steel
4.3 Gypsum shaftliner board is a single ⁄4-in. [19.0-mm] or
Studs, Runners (Tracks), and Rigid Furring Channels for
1-in. [25.4-mm] thick board.
2
Screw Application of Gypsum Board
4.4 Foil-backed gypsum backing board shall consist of
C 840 Specification for Application and Finishing of Gyp-
gypsum backing board with a layer of aluminum foil laminated
2
sum Board
to the back surface.
C 1264 Specification for Sampling, Inspection, Rejection,
4.5 Gypsum Backing Board, Type X (Special Fire-
Certification, Packaging, Marking, Shipping, Handling,
Resistant):
4.5.1 Gypsum backing board, type X, designates gypsum
backing board, except gypsum coreboard and gypsum shaft-
1
This specification is under the jurisdiction of ASTM Committee C11 on
liner board, complying with this specification that provides not
Gypsum and Related Building Materials and Systems and is the direct responsibility
of Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
Current edition approved June 10, 2001. Published August 2001. Originally
3
published as C 442 – 59 T. Last previous edition C 442 – 99a. Annual Book of ASTM Standards, Vol 04.07.
2 4
Annual Book of ASTM Standards, Vol 04.01. Annual Book of ASTM Standards, Vol 04.06.
*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

---------------------- Page: 1 ----------------------
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
C 442/C 442M – 01
5
less than 1-h fire-resista
...