ASTM C1381/C1381M-97(2013)

Standard Specification for Molded Glass Fiber Reinforced Gypsum Parts

ABSTRACT
This specification covers molded glass fiber reinforced gypsum (GRG) parts, which are nonload-bearing, thin-shell, ornamental shapes for architectural embellishment of interior building construction. GRG parts shall be produced using the same materials used to make the composites in conformance with the referenced specification. GRG parts shall be manufactured from the mixed slurry or alpha gypsum cement, potable water and additives, and glass fiber reinforcement using either the hand lay-up or the spray-up process in a mold. GRG parts shall be produced according to approved shop drawings. Shop drawings shall specify part dimensions, quantities, recommended attachment points and methods, reinforcements, embedments, and tolerance. The material shall conform to the required mechanical properties and to the specified dimensions and tolerances of GRG parts.
SCOPE
1.1 This specification covers molded glass fiber reinforced gypsum (GRG) parts, which are nonload-bearing, thin-shell, ornamental shapes for architectural embellishment of interior building construction.  
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 information presented refers to the molded surface of the part.  
1.4 The text of this standard references footnotes, which provide explanatory material. These footnotes shall not be considered as requirements of the standard.

General Information

• Status: Historical
• Publication Date: 31-May-2013
• ICS: 91.060.10 - Walls. Partitions. Facades
• 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 C1381/C1381M-97(2008)e1 - Standard Specification for Molded Glass Fiber Reinforced Gypsum Parts
• Effective Date: 01-Jun-2013
• Referred By: ASTM C1467/C1467M-00(2021) - Standard Specification for Installation of Molded Glass Fiber Reinforced Gypsum Parts
• Effective Date: 01-Jun-2013

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:C1381/C1381M −97 (Reapproved 2013)
Standard Specification for
Molded Glass Fiber Reinforced Gypsum Parts
This standard is issued under the fixed designation C1381/C1381M; 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 3.2 Definitions of Terms Specific to This Standard:
3.2.1 control thickness, n—the thickness of the GRG part
1.1 This specification covers molded glass fiber reinforced
where abutting other GRG parts, other products or at fastening
gypsum (GRG) parts, which are nonload-bearing, thin-shell,
points.
ornamental shapes for architectural embellishment of interior
3.2.2 embedments, n—materials encapsulated into the part
building construction.
for the purpose of suspension, attachment, and stiffening.
1.2 The values stated in either SI units or inch-pound units
3.2.3 finish surface, n—a surface against a mold.
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each
3.2.4 GRG part, n—an individual molded component used
system may not be exact equivalents; therefore, each system
as architectural embellishment.
shall be used independently of the other. Combining values
3.2.5 GRG product, n—combination of GRG parts used as
from the two systems may result in non-conformance with the
architectural embellishment.
standard.
3.2.6 mock-up, n—a presentation assembly of GRG parts
1.3 The information presented refers to the molded surface
defined by the purchase agreement.
of the part.
3.2.7 part thickness, n—thickness of a part at any measure-
1.4 The text of this standard references footnotes, which
ment point.
provide explanatory material. These footnote/.s shall not be
considered as requirements of the standard.
4. Materials and Manufacture
1.5 This international standard was developed in accor-
4.1 Materials—GRG parts shall be produced using the same
dance with internationally recognized principles on standard-
materials used to make the composites in conformance with
ization established in the Decision on Principles for the
Specification C1355/C1355M.
Development of International Standards, Guides and Recom-
4.2 Manufacture:
mendations issued by the World Trade Organization Technical
4.2.1 GRG parts shall be manufactured from the mixed
Barriers to Trade (TBT) Committee.
slurry of alpha gypsum cement, potable water and additives,
2. Referenced Documents
when used, and not less than 5 % by weight glass fiber
reinforcement using either the hand lay-up or the spray-up
2.1 ASTM Standards:
process in a mold.
C11 Terminology Relating to Gypsum and Related Building
4.2.2 GRG parts shall be produced according to approved
Materials and Systems
shop drawings.
C1355/C1355M Specification for Glass Fiber Reinforced
4.2.3 Shop drawings shall specify part dimensions,
Gypsum Composites
quantities, recommended attachment points and methods,
3. Terminology
reinforcements, embedments, and tolerance.
3.1 Definitions—Definitions of terms shall be in accordance
with Terminology C11. 5. Mechanical Properties
5.1 GRG parts shall be made from materials to make
This specification is under the jurisdiction of ASTM Committee C11 on
composites having properties in accordance with Specification
Gypsum and Related Building Materials and Systems and is the direct responsibility
C1355/C1355M.
of Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
Current edition approved June 1, 2013. Published August 2013. Originally
approved in 1998. Last previous edition approved in 2008 as C1381/
6. Dimensions and Tolerances of GRG Parts
ε1
C1381M – 97(2008) . DOI: 10.1520/C1381_C1381M-97R13.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6.1 Part Thickness—The thickness of the GRG part shall be
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM 3
not less than ⁄16 in. [5 mm].
Standards volume information, refer to the standard’s Document Summary page on
the AS
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