ASTM C630/C630M-00

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 C840 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 seperately as the 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: 09-May-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

• Replaced By: ASTM C630/C630M-01 - Standard Specification for Water-Resistant Gypsum Backing Board
• Effective Date: 10-May-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 630/C 630M – 00
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 * 4. Materials and Manufacture
1.1 This specification covers water-resistant gypsum back- 4.1 Water-resistant gypsum backing board shall consist of a
ing board that is designed primarily to be used as a base for the noncombustible water-resistant core, essentially gypsum, sur-
application of ceramic or plastic tile on walls or ceilings. This faced on both the face and back of the board with waterrepel-
product is also suitable for decoration. lent paper bonded to the core.
4.2 Water-resistant gypsum backing board, type X (special
NOTE 1—Specification C 840 contains application procedures for
fire resistant), designates water-resistant gypsum backing
water-resistant gypsum backing board.
board complying with this specification that provides not less
1.2 The values stated in either inch-pound units or SI
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than 1-h fire-resistance for boards ⁄8 in. [15.9 mm] thick or
(metric) units are to be regarded separately as standard. Within
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⁄4-h fire-resistance for boards ⁄2 in. [12.7 mm] thick, applied
the text, the SI units are shown in brackets. The values stated
parallel with and on each side of load bearing 2 3 4 wood
in each system shall be used independent of the other. Values
studs spaced 16 in. [406 mm] on center with 6d coated nails,
from the two systems shall not be combined.
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1 ⁄8 in. [48 mm] long, 0.0915 in. [2.32 mm] diameter shank, ⁄4
1.3 The text of this standard references notes and footnotes
in. [6.4 mm] diameter heads, spaced 7 in. [178 mm] on center
which provide explanatory material. These notes and footnotes
with gypsum backing board joints staggered 16 in. [406 mm]
(excluding those in tables and figures) shall not be considered
on each side of the partition and tested in accordance with the
as requirements of the standard.
requirements of Test Methods E 119.
2. Referenced Documents
NOTE 2—Consult producers for independent test data on assembly
details and fire resistance classifications for other types of construction.
2.1 ASTM Standards:
See official fire test reports for assembly particulars, materials, and
C 11 Terminology Relating to Gypsum and Related Build-
classifications.
2
ing Materials and Systems
C 473 Test Methods for Physical Testing of Gypsum Board
5. Physical Properties
2
Products and Gypsum Lath
5.1 Specimens shall be taken from the samples obtained in
C 645 Specification for Nonstructural Steel Framing Mem-
accordance with Specification C 1264.
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bers
5.2 Specimens shall be tested in accordance with Test
C 840 Specification for Application and Finishing of Gyp-
Methods C 473.
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sum Board
5.2.1 Flexural Strength—The specimens shall be tested face
C 1264 Specification for Sampling, Inspection, Rejection,
up and face down. The average breaking load shall be not less
Certification, Packaging, Marking, Shipping, Handling,
than the following:
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and Storage of Gypsum Board
Method A Method B
E 119 Test Methods for Fire Tests of Building Construction
Load, lbf [N] Load, lbf [N]
Load, lbf [N] Load, lbf [N]
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and Materials Bearing Edges Bearing Edges
Thickness, Bearing Edges Bearing Edges
Parallel to Parallel to
in. [mm] Across Fiber Across Fiber
Fiber of Fiber of
3. Terminology
of Surfacing of Surfacing
Surfacing Surfacing
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3.1 Definitions used in this specification shall be in accor- ⁄2 [12.7] 110 [489] 40 [178] 107 [476] 36 [160]
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⁄8 [15.9] 150 [667] 50 [222] 147 [654] 46 [205]
dance with Terminology C 11.
5.2.2 Humidified Deflection—The specimens shall have an
average deflection of not more than the following:
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This specification is under the jurisdiction of ASTM Committee C11 on
Thickness, Humidified Deflection, Eighths of an
Gypsum and Related Building Materials and Systems and is the direct responsibility
in. [mm] in. [mm]
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of Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
⁄2 [12.7] 10 [32]
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Current edition approved July 10, 2000. Published September 2000. Originally
⁄8 [15.9] 5 [16]
published as C 630 – 68T. Last previous edition C 630 – 96a.
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5.2.3 Core, End, and Edge Hardness—The specimens shall
Annual Book of ASTM Standards, Vol 04.01.
3
Annual Book of ASTM Standards, Vol 04.07.
*A Summary of Changes section appears at the end of this standard.
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