ASTM C1177/C1177M-17

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: C1177/C1177M − 13 C1177/C1177M − 17
Standard Specification for
1
Glass Mat Gypsum Substrate for Use as Sheathing
This standard is issued under the fixed designation C1177/C1177M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers glass mat gypsum substrate, which is designed to be used as an exterior substrate for a weather
barrier.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. 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.
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.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C22 Specification for Gypsum
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
D3273 Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber
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 weather barrier, n—a material that prevents the passage of rain, sleet and snow.
4. Materials and Manufacture
4.1 Glass Mat Gypsum Substrate shall consist of a noncombustible water-resistant core, essentially gypsum complying with
Specification C22, surfaced with glass mat partially, or completely embedded in the core.
4.2 Glass Mat Gypsum Substrate, type X (special fire-resistant) designates glass mat gypsum substrate complying with this
5 3
specification that provide not less than 1-h fire resistance rating for substrate ⁄8 in. [15.9 mm] thick or ⁄4-h fire resistance rating
1
for substrate ⁄2 in. [12.7 mm] thick, applied parallel with and on each side of load bearing 2 by 4 wood studs spaced 16 in. [406
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 Oct. 1, 2013Dec. 1, 2017. Published October 2013December 2017. Originally approved in 1991. Last previous edition approved in 20082013
as C1177/C1177MC1177/C1177M – 13.–08. DOI: 10.1520/C1177_C1177M-13.10.1520/C1177_C1177M-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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
1

---------------------- Page: 1 ----------------------
C1177/C1177M − 17
7 1
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 substrate joints staggered 16 in. 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
...

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: C1177/C1177M − 17
Standard Specification for
1
Glass Mat Gypsum Substrate for Use as Sheathing
This standard is issued under the fixed designation C1177/C1177M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* and Storage of Gypsum Panel Products
D3273 Test Method for Resistance to Growth of Mold on the
1.1 This specification covers glass mat gypsum substrate,
Surface of Interior Coatings in an Environmental Cham-
which is designed to be used as an exterior substrate for a
ber
weather barrier.
E119 Test Methods for Fire Tests of Building Construction
1.2 The values stated in either SI units or inch-pound units
and Materials
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each
3. Terminology
system may not be exact equivalents; therefore, each system
3.1 Definitions shall be in accordance with Terminology
shall be used independently of the other. Combining values
C11.
from the two systems may result in non-conformance with the
standard.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 glass mat, n—a mat of glass fibers with or without a
1.3 The text of this standard references notes and footnotes
binder.
that provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered 3.2.2 edge, n—the bound edge as manufactured.
as requirements of the standard.
3.2.3 weather barrier, n—a material that prevents the pas-
1.4 This international standard was developed in accor- sage of rain, sleet and snow.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 4. Materials and Manufacture
Development of International Standards, Guides and Recom-
4.1 Glass Mat Gypsum Substrate shall consist of a noncom-
mendations issued by the World Trade Organization Technical
bustible water-resistant core, essentially gypsum complying
Barriers to Trade (TBT) Committee.
with Specification C22, surfaced with glass mat partially, or
completely embedded in the core.
2. Referenced Documents
2 4.2 Glass Mat Gypsum Substrate, type X (special fire-
2.1 ASTM Standards:
resistant) designates glass mat gypsum substrate complying
C11 Terminology Relating to Gypsum and Related Building
with this specification that provide not less than 1-h fire
Materials and Systems
5 3
resistance rating for substrate ⁄8 in. [15.9 mm] thick or ⁄4-h
C22 Specification for Gypsum
1
fire resistance rating for substrate ⁄2 in. [12.7 mm] thick,
C473 Test Methods for Physical Testing of Gypsum Panel
applied parallel with and on each side of load bearing 2 by 4
Products
wood studs spaced 16 in. [406 mm] on center with 6d coated
C645 Specification for Nonstructural Steel Framing Mem-
7
nails, 1 ⁄8 in. [48 mm] long, 0.0915 in. [2.3 mm] diameter
bers
1
shank, ⁄4 in. [6.4 mm] diameter heads, spaced 7 in. [178 mm]
C1264 Specification for Sampling, Inspection, Rejection,
on center with glass mat gypsum substrate joints staggered
Certification, Packaging, Marking, Shipping, Handling,
16 in. [406 mm] on each side of the partition and tested in
accordance with Test Methods E119.
1
This specification is under the jurisdiction of ASTM Committee C11 on
NOTE 1—Consult manufacturers for independent test data on assembly
Gypsum and Related Building Materials and Systems and is the direct responsibility
details and fire resistance ratings for other types of construction. See fire
of Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
test reports or listings from recognized fire testing laboratories for
Current edition approved Dec. 1, 2017. Published December 2017. Originally
assembly particulars, materials, and ratings.
approved in 1991. Last previous edition approved in 2013 as C1177/C1177M – 13.
DOI: 10.1520/C1177_C1177M-17.
4.3 Glass mat gypsum substrate, mold resistant, designates
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
gypsum panels having not more than 20 % mold growth, based
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
on surface area coverage, when tested in accordance with Test
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Method D3273.
*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
1

---------------------- Page: 1 ----------------------
C1177/C1177M − 17
5. Physical Properties 6.
...