ASTM C37/C37M-01

Standard Specification for Gypsum Lath

SCOPE
1.1 This specification covers plain and foil-backed types of gypsum lath which is designed to be used as a base for application of gypsum plaster (see Specification C28).
Note 1--Specification C841 contains application procedures for interior lathing and furring, and Specification C842 contains application procedures for interior gypsum plaster.
1.2 The values stated in either inch-pound or SI (metric) units 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.
1.3 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.

General Information

• Status: Historical
• Publication Date: 09-May-2001
• 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 C37/C37M-99 - Standard Specification for Gypsum Lath
• Effective Date: 10-May-2001
• Referred By: ASTM C11-23 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 10-May-2001
• Referred By: ASTM D1779-98(2017) - Standard Specification for Adhesive for Acoustical Materials
• Effective Date: 10-May-2001

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 37/C 37M – 01
Standard Specification for
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Gypsum Lath
This standard is issued under the fixed designation C 37/C 37M; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope * E 119 Test Methods for Fire Tests of Building Construction
4
and Materials
1.1 This specification covers plain and foil-backed types of
gypsum lath which is designed to be used as a base for
3. Terminology
application of gypsum plaster (see Specification C 28).
3.1 Definitions of terms shall be in accordance with Termi-
NOTE 1—Specification C 841 contains application procedures for inte-
nology C 11.
rior lathing and furring, and Specification C 842 contains application
procedures for interior gypsum plaster.
4. Materials and Manufacture
1.2 The values stated in either inch-pound or SI (metric)
4.1 Plain gypsum lath shall consist of a noncombustible
units are to be regarded separately as standard. Within the text,
core, essentially gypsum, surfaced with paper bonded to the
the SI units are shown in brackets. The values stated in each
core.
system shall be used independent of the other. Values from the
4.2 Foil-backed gypsum lath shall consist of plain gypsum
two systems shall not be combined.
lath with a layer of aluminum foil laminated to the back
1.3 The text of this standard references notes and footnotes
surface.
that provide explanatory material. These notes and footnotes
NOTE 2—Foil-backed gypsum lath shall be installed with the foil
(excluding those in tables and figures) shall not be considered
surface against the framing members. The foil surface is not adapted to
as requirements of the standard.
receive or retain plaster.
2. Referenced Documents 4.3 Gypsum lath, type X (special fire-resistant) designates
gypsum lath complying with this specification that provides not
2.1 ASTM Standards:
3
less than 1 h fire-resistance for lath ⁄8 in. [9.5 mm] thick,
C 11 Terminology Relating to Gypsum and Related Build-
2 applied perpendicular with and on each side of load bearing 2
ing Materials and Systems
2 3 4 wood studs spaced 16 in. [406 mm] o.c. with blue lath
C 28 Specification for Gypsum Plasters
1
nails, 1 ⁄8 in. [29 mm] long, 0.092 in. [2.3 mm] diameter
C 473 Test Methods for Physical Testing of Gypsum Panel
19
2 shank, ⁄64 in. [7.5 mm] diameter heads, spaced 5 in. [127 mm]
Products
o.c. with lath joints staggered 16 in. [406 mm] on each side of
C 841 Specification for Installation of Interior Lathing and
1
2 the partition, over which is applied ⁄2 in. [12.7 mm] of 1:2
Furring
gypsum sand plaster, and tested in accordance with the
C 842 Specification for Application of Interior Gypsum
2 requirements of Test Method E 119.
Plaster
C 1264 Specification for Sampling, Inspection, Rejection,
NOTE 3—Consult producers for independent test data on assembly
Certification, Packaging, Marking, Shipping, Handling, details and fire resistance classifications for other types of construction.
2
See fire test reports, or listings from recognized fire testing laboratories,
and Storage of Gypsum Board
for assembly particulars, materials, and classifications.
E 96 Test Methods for Water Vapor Transmission of Mate-
3 NOTE 4—The definition of type X as given in 4.3 is intended only as a
rials
test to define the gypsum lath as meeting the requirements of type X. This
test does not indicate a preferred application nor does it limit the use of the
product in other fire rated assemblies.
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This specification is under the jurisdiction of ASTM Committee C11 on
5. Physical Properties
Gypsum and Related Building Materials and Systems and is the direct responsibility
5.1 Specimens shall be taken from the samples obtained in
of Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
Current edition approved May 10, 2001. Published July 2001. Originally accordance with Specification C 1264.
published as C 37 – 21 T. Last previous edition C 37 – 99.
2
Annual Book of ASTM Standards, Vol 04.01.
3
Annual Book of ASTM Standards, Vol 04.06.
4
Annual Book of ASTM Standards, Vol 04.07.
*A Summary of Changes section appears at the end of this standard.
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C 37/C 37M
5.2 Specimens shall be tested in accordance with Test 6. Dimensions and Tolerances
Methods C 473.
6.1 Specimens shall be taken from the samples obtained in
5.2.1 Flexural Strength—The specimens shall be tested face
accordance with Specifica
...