ASTM C1658 - C 1658M - 19e1
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Designation: C1658/C1658M −19
´1
Standard Specification for
Glass Mat Gypsum Panels
1
This standard is issued under the fixed designation C1658/C1658M; 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.
ε
1
NOTE—Removed “6” editorially from width values in 6.2.2 in July 2020.
1. Scope*
1.1 This specification covers the glass mat gypsum panels
described in 1.1.1 – 1.1.3.
1.1.1 Glass mat interior gypsum panel, designed for use on
walls, ceilings, or partitions and that affords a surface suitable
to receive decoration.
1.1.2 Glass mat coreboard gypsum panel, and glass mat
shaftliner gypsum panel, designed for use as a base in
multilayer systems or as gypsum studs or cores in semisolid or
solid gypsum board partitions, or in shaftwall assemblies.
1.1.3 Glass mat water-resistant gypsum panel, designed to
be used as a base for the application of ceramic or plastic tile
on walls or ceilings. This product is also suitable for decora-
tion. (This is distinct from a coated glass mat water-resistant
gypsum panel ASTM 1178.)
1.2 Specifications applicable to all glass mat gypsum panels
are located in Sections 1–4and 8–10. Specifications
applicable to specific glass mat gypsum panels are located in
the following sections:
Section
Glass mat interior gypsum panel 5
Glass mat coreboard gypsum panel, and glass
mat shaftliner gypsum panel
6
Glass mat water-resistant gypsum panel 7
1.3 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.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
2
C11 Terminology Relating to Gypsum and Related Building
Materials and Systems
C22/C22M Specification for Gypsum
C473 Test Methods for Physical Testing of Gypsum Panel
Products
C645 Specification for Nonstructural Steel Framing Mem-
bers
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 Cham-
ber
E84 Test Method for Surface Burning Characteristics of
Building Materials
E119 Test Methods for Fire Tests of Building Construction
and Materials
3. Terminology
3.1 Definitions used in this specification shall be in accor-
dance 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.
4. Materials and Manufacture
4.1 Glass mat gypsum panel shall consist of a noncombus-
tible core, essentially gypsum complying with Specification
C22/C22M, surfaced with glass mat partially or completely
embedded in the core.
4.1.1 Glass mat interior gypsum panel shall consist of a
noncombustible core, essentially gypsum complying with
Specification C22/C22M, surfaced on both the face and back
with glass mat partially or completely embedded into the core.
1
This test method 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 Sept. 1, 2019. Published October 2019. Originally
approved in 2006. Last previous edition approved in 2018 as C1658/C1658M – 18.
DOI: 10.1520/C1658_C1658M-19E01.
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
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.
4.1.2 Glass mat coreboard gypsum panel, and glass mat
shaftliner gypsum panel shall be either a single panel or
composed of two factory-laminated gypsum panels to provide
up to 1 in. [25.4 mm] total nominal thickness, surfaced on both
face and back with glass mat partially or completely embedded
into the core.
4.1.3 Glass mat gypsum water-resistant panel shall consist
of a noncombustible water-resistant core, essentially gypsum
complying with Specification C22/C22M, surfaced on the face
with water-resistant glass mat partially or completely embed-
ded into the core.
4.1.4 Glass mat gypsum panels, mold resistant, designates
gypsum panels having not more than 20 % mold growth, based
on surface area coverage, when tested in accordance with Test
Method D3273.
4.2 Glass Mat Interior Gypsum Panel, and Glass Mat
Water-resistant Gypsum Panel, Type X (Special Fire-resistant)
designates glass mat gypsum panel complying with this speci-
fication that provide not less than 1 h fire resistance for panel
5
⁄
8
in. [15.9 mm] thick or
3
⁄
4
h fire resistance for panel
1
⁄
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 mm] on center
with 6d coated nails, 1
7
⁄
8
in. [48 mm] long, 0.0915 in. [2.3 mm]
diameter shank,
1
⁄
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 classifications for other types of construction.
See fire test reports or listings from recognized fire testing laboratories for
assembly particulars, materials, and classifications.
4.3 Glass Mat Shaftliner Gypsum Panel, type X, designates
glass mat gypsum shaftliner panel complying with this speci-
fication that meets the acceptance criteria for temperature rise
for not less than panels 1-in. [25.4 mm] thick, when applied in
a double layer solid non-load bearing partition as described in
4.3.2 and tested in accordance with Test Methods E119 with
thermocouple locations as specified in 4.3.2.
4.3.1 Two layers of glass mat gypsum shaftliner panel
applied vertically and friction fit into vertical 25-gauge steel
“H” members, 2-in. [50.8 mm] deep for panels 1-in. [25.4 mm]
thick, spaced 24-in. [610 mm] on centers and 25-gauge steel
track at the perimeter of the partition. “H” members shall be
formed with a single web or shall be two pieces of perimeter
track fastened together along the web with screws spaced
24-in. [610 mm] on centers.
4.3.2 Temperature rise on the unexposed surface shall be
measured using not less than five thermocouples; one shall be
located at the center of the assembly and one shall be located
at the center of each quadrant. Thermocouples shall be located
not less than 3-in. [76 mm] from an “H” member.
4.4 Glass mat gypsum panels shall have a flame spread
index of not more than 25 when tested in accordance with Test
Method E84.
4.5 Physical Properties, Dimensions, and Tolerances of
Glass Mat Gypsum Panel:
4.5.1 Specimens shall be taken from the samples obtained in
accordance with Specification C1264.
4.5.1.1 Specimens shall be tested in accordance with Test
Methods C473.
4.5.2 Core, End, and Edge Hardness—The specimens shall
have an average hardness of not less than 15 lbf [67 N] when
tested by Method A or by Method B.
4.5.3 Edges and Ends—The edges and ends shall be
straight.
4.5.4 Length—The tolerance in length shall be 6
1
⁄
4
in. [66
mm].
4.5.5 Tapered Edge Depth—The average thickness of the
edge of recessed or tapered edge glass mat gypsum panel shall
be not less than 0.020 in. [0.51 mm] but not more than 0.090 in.
[2.29 mm] less than the average thickness of the glass mat
gypsum panel.
5. Glass Mat Interior Gypsum Panel
5.1 Physical Properties of Glass Mat Interior Gypsum
Panel:
5.1.1 Flexural Strength—The specimens shall be tested face
up and face down. The average breaking load shall be not less
than the following:
Method A or B
Thickness, in. [mm]
Load, lbf [N] Bearing
edges perpendicular to
the panel edge
Load, lbf [N] Bearing
edges parallel to the
panel edge
1
⁄
4
[6.4] 50 [222] 40 [178]
3
⁄
8
[9.5] 75 [334] 60 [267]
1
⁄
2
[12.7] 100 [445] 80 [356]
5
⁄
8
[15.9] 140 [623] 100 [445]
5.1.2 Humidified Deflection—The specimens shall have an
average deflection of not more than the following:
Thickness, in. [mm] Deflection, sixteenths of an in. [mm]
1
⁄
4
[6.4] not required
3
⁄
8
[9.5] not required
1
⁄
2
[12.7] 5 [8]
5
⁄
8
[15.9] 4 [6]
5.1.3 Nail Pull Resistance—The specimens shall have an
average nail-pull resistance of not less than the following:
Thickness, in. [mm] Method A or B, lbf [N]
1
⁄
4
[6.4] 40 [178]
3
⁄
8
[9.5] 60 [267]
1
⁄
2
[12.7] 80 [356]
5
⁄
8
[15.9] 90 [400]
5.2 Dimensions and Tolerances of Glass Mat Interior Gyp-
sum Panel:
5.2.1 Thickness—The nominal thickness shall be from
1
⁄
4
to
5
⁄
8
in. [6.4 to 15.9 mm] with tolerances in the nominal thickness
of 6
1
⁄
64
in. [60.4 mm], and with local variations of 6
1
⁄
32
in.
[60.8 mm] from the nominal thickness.
5.2.2 Width—The width shall be up to 48 in. [1220 mm], or
up to 54 in. [1370 mm], with a tolerance of
3
⁄
32
in. [3 mm]
under the specified width.
5.2.3 End Squareness—Corners shall be square with a
tolerance of 6
1
⁄
8
in. [63 mm] in the full width of the board.
5.3 Edges:
5.3.1 The edges of glass mat interior gypsum panel shall be
either square, beveled, featured, tapered, or featured and
tapered.
C1658/C1658M − 19
´1
2
6. Glass Mat Coreboard Gypsum Panel, and Glass Mat
Shaftliner Gypsum Panel
6.1 Physical Properties of Glass Mat Coreboard Gypsum
Panel and Glass Mat Shaftliner Gypsum Panel:
6.1.1 Flexural Strength—The specimens shall be tested face
up and face down. The average breaking load shall be not less
than the following:
Method A or B
Thickness, in. [mm]
Load, lbf [N] Bearing
edges perpendicular to
the panel edge
Load, lbf [N] Bearing
edges parallel to the
panel edge
1 [25.4] 230 [1023] 80 [356]
6.2 Dimensions and Tolerances of Glass Mat Coreboard
Gypsum Panel, and Glass Mat Shaftliner Gypsum Panel:
6.2.1 Thickness—The nominal thickness shall be 1 in.
[25.4 mm] with tolerances in the nominal thickness of 6
1
⁄
32
in.
[60.8 mm], and with local variations of 6
1
⁄
16
in. [61.6 mm]
from the nominal thickness.
6.2.2 Width—The width shall be from 16 to 48 in. [406 to
1220 mm] with a tolerance of
1
⁄
8
in. [3 mm] under the specified
width.
6.2.3 End Squareness—Corners shall be square with a
tolerance of 6
1
⁄
8
in. [63 mm] in the full width of the board.
6.3 Edges—The edges shall be either square, beveled,
round, V-tongue and groove, or featured.
7. Glass Mat Water-Resistant Gypsum Panel
7.1 Physical Properties of Glass Mat Water-Resistant Gyp-
sum Panel:
7.1.1 Flexural Strength—The specimens shall be tested face
up and face down. The average breaking load shall be not less
than the following:
Method A or B
Thickness, in. [mm]
Load, lbf [N] Bearing
edges perpendicular to
the panel edge
Load, lbf [N] Bearing
edges parallel to the
panel edge
3
⁄
8
[9.5] 75 [334] 60 [267]
1
⁄
2
[12.7] 100 [445] 80 [356]
5
⁄
8
[15.9] 140 [623] 100 [445]
7.1.2 Humidified Deflection—The specimens shall have an
average deflection of not more than the following:
Thickness, in. [mm] Deflection, sixteenths of an in. [mm]
3
⁄
8
[9.5] not required
1
⁄
2
[12.7] 5 [8]
5
⁄
8
[15.9] 4 [6]
7.1.3 Nail Pull Resistance—The specimens shall have an
average nail-pull resistance of not less than the following:
Method A or B
Thickness, in. [mm] lbf [N]
3
⁄
8
[9.5] 60 [267]
1
⁄
2
[12.7] 80 [356]
5
⁄
8
[15.9] 90 [400]
7.1.4 Water Resistance—The specimens shall have an aver-
age water absorption of not more than 5 weight % after 2-h
immersion.
7.2 Dimensions and Tolerances of Glass Mat Water-
Resistant Gypsum Panel:
7.2.1 Thickness—The nominal thickness shall be
1
⁄
2
or
5
⁄
8
in.
[12.7 or 15.9 mm] with tolerances in the nominal thickness of
6
1
⁄
64
in. [60.4 mm], and with local variations of 6
1
⁄
32
in.
[60.8 mm] from the nominal thickness.
7.2.2 Width—The width shall be up to 48 in. [1220 mm], or
up to 54 in. [1370 mm], with a tolerance of
3
⁄
32
in. [3 mm]
under the specified width.
7.2.3 End Squareness—Corners shall be square with a
tolerance of 6
1
⁄
8
in. [63 mm] in the full width of the board.
7.3 Edges—The edges shall be either square, beveled,
featured, tapered, or featured and tapered.
8. Finish and Appearance
8.1 The glass mat gypsum panel surface shall be true and
free from imperfections that would render it unfit for use with
or without decoration.
9. Sampling, Inspection, Rejection, Certification,
Packaging, Marking, Shipping, Handling, and Storage
9.1 Sampling, inspection, rejection, certification, packaging,
marking, shipping, handling, and storage of glass mat gypsum
panel shall be in accordance with Specification C1264.
10. Keywords
10.1 ceiling; coreboard; glass mat; glass mat gypsum panel;
partitions; shaftliner; type X; wall; water-resistant
APPENDIX
(Nonmandatory Information)
X1. ALTERNATE DEFINITION FOR TYPE X
X1.1 The definition of type X as given in 4.2 and 4.3 and the
alternate definition given in this appendix, are intended only as
a test to define the glass mat gypsum panel as meeting the
requirements of type X products. These tests do not indicate a
preferred application nor do they limit the use of the product in
other fire rated assemblies.
X1.2 This appendix gives general information and also
suggestions for inclusions to be made elsewhere by the
specifier. They are not part of this specification.
X1.3 All gypsum panel products for which type X is
defined, except shaftliner gypsum panel, use the same test for
type X products, therefore the type X definition indicates a
consistent level of fire resistance.
X1.4 Glass mat gypsum panel, type X (special fire-resistant)
designates glass mat gypsum panel providing a greater fire-
resistance than regular glass mat gypsum panel of the same
thickness. Type X (special fire-resistant) glass mat gypsum
panel, when tested in accordance with Test Methods E119,
C1658/C1658M − 19
´1
3
摘要：
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ASTM C1658 - C 1658M - 19e1 是一项由美国材料与试验协会发布的标准化规范，主要涵盖了用于建筑和工业领域的高温玻璃纤维保温材料的性能要求、测试方法和分类标准。该标准旨在确保在高温环境下使用的玻璃纤维保温材料具有稳定的热传导性能、机械强度以及耐火特性，适用于管道、锅炉、储罐等设备的隔热工程。通过明确材料密度、厚度、热阻值及线性收缩率等关键指标，本标准为制造商、工程师和建筑承包商提供了统一的质量评估依据，从而提升工程安全性与能源效率。最新修订版 C 1658M - 19e1
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