ASTM C1178/C1178M-11
(Specification)Standard Specification for Coated Glass Mat Water-Resistant Gypsum Backing Panel
Standard Specification for Coated Glass Mat Water-Resistant Gypsum Backing Panel
ABSTRACT
This specification covers coated glass mat water-resistant gypsum backing panel designed for use on ceilings and walls in bath and shower areas as a base for the application of ceramic or plastic tile. Coated glass mat water-resistant gypsum backing panel shall consist of a noncombustible water-resistant gypsum core, surfaced with glass mat, partially or completely embedded in the core, and with a water-resistant coating on one surface. The specimens shall be tested for flexural strength, humidified deflection, core hardness, end hardness, edge hardness, nail pull resistance, water resistance, and surface water absorption. Coated glass mat water-resistant gypsum backing panel shall have surfaces true and free of imperfections that render the panel unfit for its designed use.
SCOPE
1.1 This specification covers coated glass mat water-resistant gypsum backing panel designed for use on ceilings and walls in bath and shower areas as a base for the application of ceramic or plastic tile.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Within the text, the SI units are shown in brackets.
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
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Designation:C1178/C1178M −11
StandardSpecification for
1
Coated Glass Mat Water-Resistant Gypsum Backing Panel
ThisstandardisissuedunderthefixeddesignationC1178/C1178M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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.
1. Scope* 3. Terminology
3.1 Definitions shall be in accordance with Terminology
1.1 This specification covers coated glass mat water-
C11.
resistant gypsum backing panel designed for use on ceilings
and walls in bath and shower areas as a base for the application
3.2 Definitions of Terms Specific to This Standard:
of ceramic or plastic tile.
3.2.1 glass mat, n—a mat of glass fibers with or without a
binder.
1.2 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in 3.2.2 edge, n—the bound edge as manufactured.
each system may not be exact equivalents; therefore, each
3.2.3 face, n—the coated surface.
system shall be used independently of the other. Combining
3.2.4 nominal thickness, n—the manufacturer-stated frac-
values from the two systems may result in non-conformance
tional value of thickness of the gypsum panel product ex-
with the standard. Within the text, the SI units are shown in
pressed in decimal value to the nearest one-thousandth (0.001)
brackets.
of an inch.
1.3 The text of this standard references notes and footnotes
4. Materials and Manufacture
that provide explanatory material. These notes and footnotes
4.1 Coated glass mat water-resistant gypsum backing panel
(excluding those in tables and figures) shall not be considered
shall consist of a noncombustible water-resistant core, essen-
as requirements of the standard.
tially gypsum, surfaced with glass mat, partially or completely
embeddedinthecore,andwithawater-resistantcoatingonone
2. Referenced Documents
surface.
2
2.1 ASTM Standards:
4.2 Coated glass mat water-resistant gypsum panels, type X
C11 Terminology Relating to Gypsum and Related Building
(special fire-resistant) designates glass mat gypsum panels
Materials and Systems
complying with this specification that provide not less than 1-h
C473 Test Methods for Physical Testing of Gypsum Panel
5 3
fire resistance rating for boards ⁄8 in. [15.9 mm] thick or ⁄4-h
Products
1
fire resistance rating for panels ⁄2 in. [12.7 mm] thick, applied
C645 Specification for Nonstructural Steel Framing Mem-
parallel with and on each side of load bearing 2 by 4 wood
bers
studs spaced 16 in. [406 mm] on center with 6d coated nails,
C1264 Specification for Sampling, Inspection, Rejection,
7 1
1 ⁄8 in. [48-mm] long, 0.0915 in. [2.3 mm] diameter shank, ⁄4
Certification, Packaging, Marking, Shipping, Handling,
in. [6.4 mm] diameter heads, spaced 7 in. [178 mm] on center
and Storage of Gypsum Panel Products
with glass mat gypsum panel joints staggered 16 in. [406 mm]
E119 Test Methods for Fire Tests of Building Construction
on each side of the partition and tested in accordance with Test
and Materials
Methods E119.
NOTE 1—Consult manufacturers for independent test data on assembly
details and fire resistance ratings for other types of construction. See fire
1
This specification is under the jurisdiction of ASTM Committee C11 on
test reports or listings from recognized fire testing laboratories for
Gypsum and Related Building Materials and Systems and is the direct responsibility
assembly particulars, materials, and ratings.
of Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
Current edition approved Oct. 1, 2011. Published November 2011. Originally
5. Physical Properties
approved in 1991. Last previous edition approved in 2008 as C1178/C1178M – 08.
5.1 Specimens shall be taken from the samples obtained in
DOI: 10.1520/C1178_C1178M-11.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
accordance with Specification C1264.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.2 Specimens shall be tested in accordance with Test
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Methods C473.
*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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C1178/C1178M−11
5.2.1 Flexural Strength—The specimens shall be tested face 6. Dimensions and Tolerances
up and face down. The average breaking load shall not be less
6.1 Specimens shall be taken from the samples obtained in
than the following:
accordance with Specification C1264.
Method B
6.2 Thickness, width, an
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:C1178/C1178M–08 Designation: C1178/C1178M – 11
Standard Specification for
1
Coated Glass Mat Water-Resistant Gypsum Backing Panel
ThisstandardisissuedunderthefixeddesignationC1178/C1178M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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.
1. Scope*
1.1 This specification covers coated glass mat water-resistant gypsum backing panel designed for use on ceilings and walls in
bath and shower areas as a base for the application of ceramic or plastic tile.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard. Within the text, the SI units are shown in brackets.
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
2. Referenced Documents
2
2.1 ASTM Standards:
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C473 Test Methods for Physical Testing of Gypsum Panel Products
C645 Specification for Nonstructural Steel Framing Members
C1264 Specification for Sampling, Inspection, Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage
of Gypsum Panel Products
E119 Test Methods for Fire Tests of Building Construction and Materials
3. Terminology
3.1 Definitions shall be in accordance with Terminology C11.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 glass mat, n—a mat of glass fibers with or without a binder.
3.2.2 edge, n—the bound edge as manufactured.
3.2.3 face, n—the coated surface.
3.2.4 nominal thickness, n—the manufacturer-stated fractional value of thickness of the gypsum panel product expressed in
decimal value to the nearest one-thousandth (0.001) of an inch.
4. Materials and Manufacture
4.1 Coated glass mat water-resistant gypsum backing panel shall consist of a noncombustible water-resistant core, essentially
gypsum, surfaced with glass mat, partially or completely embedded in the core, and with a water-resistant coating on one surface.
4.2 Coated glass mat water-resistant gypsum panels, type X (special fire-resistant) designates glass mat gypsum panels
5 3
complying with this specification that provide not less than 1-h fire resistance rating for boards ⁄8 in. [15.9 mm] thick or ⁄4-h fire
1
resistance rating for panels ⁄2 in. [12.7 mm] thick, applied parallel with and on each side of load bearing 2 by 4 wood studs spaced
7 1
16 in. [406 mm] on center with 6d coated nails, 1 ⁄8 in. [48-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 gypsum panel joints staggered 16 in. [406 mm] on each side of
the partition and tested in accordance with Test Methods E119.
NOTE 1—Consult manufacturers for independent test data on assembly details and fire resistance ratings for other types of construction. See fire test
reports or listings from recognized fire testing laboratories for assembly particulars, materials, and ratings.
1
This specification is under the jurisdiction of ASTM Committee C11 on 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 Aug. 1, 2008. Published September 2008. Originally approved in 1991. Last previous edition approved in 2006 as C1178/C 1178M – 06. DOI:
10.1520/C1178_C1178M-08.
Current edition approved Oct. 1, 2011. Published November 2011. Originally approved in 1991. Last previous edition approved in 2008 as C1178/C1178M – 08. DOI:
10.1520/C1178_C1178M-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM 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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