ASTM C1177/C1177M-01

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 1177/C 1177M – 01
Standard Specification for
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Glass Mat Gypsum Substrate for Use as Sheathing
This standard is issued under the fixed designation C 1177/C 1177M; 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 * 3.2.3 weather barrier, n—a material that prevents the pas-
sage of rain, sleet and snow.
1.1 This specification covers glass mat gypsum substrate,
which is designed to be used as an exterior substrate for a
4. Materials and Manufacture
weather barrier.
4.1 Glass Mat Gypsum Substrate shall consist of a noncom-
1.2 The values stated in either inch-pound units or SI
bustible water-resistant core, essentially gypsum, surfaced with
(metric) are to be regarded separately as standard. Within the
glass mat partially, or completely embedded in the core.
text, the SI units are shown in brackets. The values stated in
4.2 Glass Mat Gypsum Substrate, type X (special fire-
each system shall be used independently of the other. Values
resistant) designates glass mat gypsum substrate complying
from the two systems shall not be combined.
with this specification that provide not less than1hfire
1.3 The text of this standard references notes and footnotes
5 3
resistance for substrate ⁄8 in. [15.9 mm] thick or ⁄4 h fire
that provide explanatory material. These notes and footnotes
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resistance for substrate ⁄2 in. [12.7 mm] thick, applied parallel
(excluding those in tables and figures) shall not be considered
with and on each side of load bearing 2 by 4 wood studs spaced
as requirements of the standard.
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16 in. [406 mm] on center with 6d coated nails, 1 ⁄8 in. [48
1
2. Referenced Documents mm] long, 0.0915 in. [2.3 mm] diameter shank, ⁄4 in. [6.4 mm]
diameter heads, spaced 7 in. [178 mm] on center with glass mat
2.1 ASTM Standards:
gypsum substrate joints staggered 16 in. [406 mm] on each side
C 11 Terminology Relating to Gypsum and Related Build-
2
of the partition and tested in accordance with Test Methods
ing Materials and Systems
E 119.
C 473 Test Methods for Physical Testing of Gypsum Board
2
Panel Products
NOTE 1—Consult manufacturers for independent test data on assembly
C 645 Specification for Nonstructural Steel Framing Mem-
details and fire resistance classifications for other types of construction.
2
See fire test reports or listings from recognized fire testing laboratories for
bers
assembly particulars, materials, and classifications.
C 1264 Specification for Sampling, Inspection, Rejection,
Certification, Packaging, Marking, Shipping, Handling,
5. Physical Properties
2
and Storage of Gypsum Board.
5.1 Specimens shall be taken from the samples obtained in
E 119 Test Methods for Fire Tests of Building Construction
3 accordance with Specification C 1264.
and Materials
5.2 Specimens shall be tested in accordance with Methods
3. Terminology C 473.
5.2.1 Flexural Strength—The specimens shall be tested face
3.1 Definitions shall be in accordance with Terminology
up and face down. The average breaking load shall not be less
C11.
than the following:
3.2 Definitions of Terms Specific to This Standard:
Method B
3.2.1 glass mat, n—a mat of glass fibers with or without a
binder.
Load, lbf [N] Bearing Load, lbf [N] Bearing edges
3.2.2 edge, n—the bound edge as manufactured.
Thickness, edges perpendicular to parallel to the substrate
in. [mm] the substrate edge edge
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⁄4 [6.4] 50 [222] 40 [178]
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⁄2 [12.7] 100 [445] 80 [356]
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This specification is under the jurisdiction of ASTM Committee C11 on
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⁄8 [15.9] 140 [623] 100 [445]
Gypsum and Related Building Materials and Systems and is the direct responsibility
of Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products. 5.2.2 Humidified Deflection—Specimens shall have an av-
Current edition approved May 10, 2001. Published August 2001. Originally
erage deflection of not more than the following:
published as C 1177 – 91. Last previous edition C 1177/C 1177M–99.
2 Thickness, Humidified deflection,
Annual Book of ASTM Standards, Vol 04.01.
3 in. [mm] eighths of an in. [mm]
Annual Book of ASTM Standards, Vol 04.07.
*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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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C 1177/C 1177M
6.2.3 Length—The nominal length and tolerance shall be as
1
⁄4 [6.4] not required
follows:
1
⁄2 [12.7] 2 [6]
Thic
...