ASTM C630/C630M-03

Standard Specification for Water-Resistant Gypsum Backing Board

SCOPE
1.1 This specification covers water-resistant gypsum backing board that is designed primarily to be used as a base for the application of ceramic or plastic tile on walls or ceilings. This product is also suitable for decoration.
Note 1—Specification C 840 contains application procedures for water-resistant gypsum backing board.
1.2 The values stated in either inch-pound units or SI (metric) units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system shall be used independent of the other. Values from the two systems shall not be combined.
1.3 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.

General Information

• Status: Historical
• Publication Date: 30-Sep-2003
• 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 C630/C630M-01 - Standard Specification for Water-Resistant Gypsum Backing Board
• Effective Date: 01-Oct-2003

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C 630/C 630M – 03
Standard Specification for
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Water-Resistant Gypsum Backing Board
This standard is issued under the fixed designation C 630/C 630M; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 3. Terminology
1.1 This specification covers water-resistant gypsum back- 3.1 Definitions used in this specification shall be in accor-
ing board that is designed primarily to be used as a base for the dance with Terminology C 11.
application of ceramic or plastic tile on walls or ceilings. This
4. Materials and Manufacture
product is also suitable for decoration.
4.1 Water-resistant gypsum backing board shall consist of a
NOTE 1—Specification C 840 contains application procedures for
noncombustible water-resistant core, essentially gypsum, sur-
water-resistant gypsum backing board.
faced on both the face and back of the board with waterrepel-
1.2 The values stated in either inch-pound units or SI
lent paper bonded to the core.
(metric) units are to be regarded separately as standard. Within
4.2 Water-resistant gypsum backing board, type X (special
the text, the SI units are shown in brackets. The values stated
fire resistant), designates water-resistant gypsum backing
in each system shall be used independent of the other. Values
board complying with this specification that provides not less
from the two systems shall not be combined.
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than 1-h fire-resistance for boards ⁄8 in. [15.9 mm] thick or
1.3 The text of this standard references notes and footnotes
3 1
⁄4-h fire resistance for boards ⁄2 in. [12.7 mm] thick, applied
which provide explanatory material. These notes and footnotes
parallel with and on each side of load bearing 2 3 4 wood
(excluding those in tables and figures) shall not be considered
studs spaced 16 in. [406 mm] on center with 6d coated nails,
as requirements of the standard.
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1 ⁄8 in. [48 mm] long, 0.0915-in. [2.32-mm] diameter shank,
1
⁄4-in. [6.4-mm] diameter heads, spaced 7 in. [178 mm] on
2. Referenced Documents
center with gypsum backing board joints staggered 16 in. [406
2
2.1 ASTM Standards:
mm] on each side of the partition and tested in accordance with
C 11 Terminology Relating to Gypsum and Related Build-
the requirements of Test Methods E 119.
ing Materials and Systems
NOTE 2—Consult producers for independent test data on assembly
C 473 Test Methods for Physical Testing of Gypsum Panel
details and fire-resistance classifications for other types of construction.
Products
See fire test reports or listings from recognized fire testing laboratories. for
C 645 Specification for Nonstructural Steel Framing Mem-
assembly particulars, materials, and classifications.
bers
C 840 Specification for Application and Finishing of Gyp-
5. Physical Properties
sum Board
5.1 Specimens shall be taken from the samples obtained in
C 1264 Specification for Sampling, Inspection, Rejection,
accordance with Specification C 1264.
Certification, Packaging, Marking, Shipping, Handling,
5.2 Specimens shall be tested in accordance with Test
and Storage of Gypsum Board
Methods C 473.
E 11 Test Methods for Fire Tests of Building Construction
5.2.1 Flexural Strength—The specimens shall be tested face
and Materials
up and face down. The average breaking load shall be not less
than the following:
1 Method A Method B
This specification is under the jurisdiction of ASTM Committee C11 on
Load, lbf [N] Load, lbf [N]
Gypsum and Related Building Materials and Systems and is the direct responsibility
Load, lbf [N] Load, lbf [N]
Bearing Edges Bearing Edges
of Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products. Thickness, Bearing Edges Bearing Edges
Parallel to Parallel to
Current edition approved October 1, 2003. Published November 2003. Originally in. [mm] Across Fiber Across Fiber
Fiber of Fiber of
of Surfacing of Surfacing
approved in 1968. Last previous edition approved in 2001 as C 630/C 630M – 01.
Surfacing Surfacing
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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⁄2 [12.7] 110 [489] 40 [178] 107 [476] 36 [160]
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
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⁄8 [15.9] 150 [667] 50 [222] 147 [654] 46 [205]
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*A Summary of Changes section appears at the end of this standard.
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