ASTM C1395/C1395M-04

Specification for Gypsum Ceiling Board

SCOPE
1.1 This specification covers 1/2 in. [12.7 mm] thick gypsum ceiling board designed for use on interior ceilings with framing spaced not more than 24 in. [610 mm] on center and that affords a surface suitable to receive water-based texture and other decoration. This product is also suitable for use on interior walls.
Note 1—Specification C 840 contains application procedures for gypsum ceiling board.
1.2 The values stated in either inch-pound units or SI (metric) 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.

General Information

• Status: Historical
• Publication Date: 31-Dec-2003
• ICS: 91.060.10 - Walls. Partitions. Facades
• 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 C1395/C1395M-01 - Specification for Gypsum Ceiling Board
• Effective Date: 01-Jan-2004

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 1395/C 1395M – 04
Specification for
1
Gypsum Ceiling Board
This standard is issued under the fixed designation C 1395/C 1395M; 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.
1. Scope* 3. Terminology
1
1.1 This specification covers ⁄2 in. [12.7 mm] thick gypsum 3.1 Definitions used in this specification shall be in accor-
ceiling board designed for use on interior ceilings with framing dance with Terminology C 11.
spaced not more than 24 in. [610 mm] on center and that
4. Materials and Manufacture
affords a surface suitable to receive water–based texture and
other decoration. This product is also suitable for use on 4.1 Gypsum ceiling board shall consist of a noncombustible
core, essentially gypsum, surfaced with paper bonded to the
interior walls.
core.
NOTE 1—Specification C 840 contains application procedures for gyp-
4.2 Gypsum ceiling board, type X (special fire-resistant),
sum ceiling board.
designates gypsum ceiling board complying with this specifi-
1.2 The values stated in either inch–pound units or SI
3
cation that provides not less than ⁄4 h fire–resistance for boards
(metric) are to be regarded separately as standard. Within the
applied parallel with and on each side of load bearing 2 3 4
text, the SI units are shown in brackets. The values stated in
wood studs spaced 16 in. [406 mm] on centers with 6d coated
each system shall be used independent of the other. Values
7
nails, 1 ⁄8 in. [48 mm] long, 0.0915 in. [2.3 mm] diameter
from the two systems shall not be combined.
1
shank, ⁄4 in. [6.4 mm] diameter heads, spaced 7 in. [178 mm]
on centers with gypsum board joints staggered 16 in. [406 mm]
2. Referenced Documents
on each side of the partition and tested in accordance with Test
2
2.1 ASTM Standards:
Methods E 119.
C 11 Terminology Relating to Gypsum and Related Build-
NOTE 2—Consult producers for independent test data on assembly
ing Materials and Systems
details and fire resistance classifications for other types of construction.
C 473 Test Methods for Physical Testing of Gypsum Panel
See fire test reports or listings from recognized fire testing laboratories for
Products
assembly particulars, materials, and classifications.
C 645 Specification for Nonstructural Steel Framing Mem-
4.3 Gypsum ceiling board shall have a flame spread index of
bers
not more than 25 when tested in accordance with Test Method
C 840 Specification for Application and Finishing of Gyp-
E 84.
sum Board
C 1264 Specification for Sampling, Inspection, Rejection,
5. Physical Properties
Certification, Packaging, Marking, Shipping, Handling,
5.1 Specimens shall be taken from the samples obtained in
and Storage of Gypsum Board
accordance with Specification C 1264.
E 84 Test Method for Surface Burning Characteristics of
5.1.1 Specimens shall be tested in accordance with Test
Building Materials
Methods C 473.
E 119 Test Methods for Fire Tests of Building Construction
5.1.2 Flexural Strength—The specimens shall be tested face
and Materials
up and face down. The average breaking load shall be not less
than that given in Table 1.
1
This test method is under the jurisdiction of ASTM C11 on Gypsum and 5.1.3 Humidified Deflection—The specimens shall have an
Related Building Materials and Systems and is the direct responsibility of 5
average deflection of not more than ⁄16 in. [8 mm].
Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
5.1.4 Core, End, and Edge Hardness—The specimens shall
Current edition approved Jan. 1, 2004. Published January 2004. Originally
have an average hardness of not less than 15 lbf [67 N] when
approved in 1998. Last previous edition approved in 2001 as C 1395/C 1395M-01.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tested by Method A and 11 lbf [49 N] when tested by Method
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
B.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C 1395/C 1395M – 04
TABLE 1 Flexural Strength
6.2.4 Tapered Edge Depth—The average thickness of the
METHOD A METHOD B edge of recessed or tapered edge shall be not less than 0.020 in.
Load, lbf [N] Load, lbf [N] Load, lbf [N] Load, lbf [N]
[0.51 mm] but not more than 0.090 in. [2.29 mm] less than the
Bearing Edges Bearing Edges Bearing Edges Bearing Edges
average thickness
...