ASTM C1766-15(2019)

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.
Designation: C1766 −15 (Reapproved 2019)
Standard Specification for
Factory-Laminated Gypsum Panel Products
This standard is issued under the fixed designation C1766; 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 C1278 Specification for Fiber-Reinforced Gypsum Panel
C1396 Specification for Gypsum Board
1.1 This specification covers the factory-laminated gypsum
C1658 Specification for Glass Mat Gypsum Panels
panel products designed either for use on walls, ceilings, or
E84 Test Method for Surface Burning Characteristics of
partitions as part of a sound control system; or for use as a
Building Materials
gypsum stud or gypsum coreboard.
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 used in this specification shall be in accor-
shall be used independently of the other. Combining values
dance with Terminology C11.
from the two systems may result in non-conformance with the
standard.
4. Materials and Manufacture
1.3 This standard does not purport to address all of the
4.1 Factory-laminated gypsum panel products shall be com-
safety concerns, if any, associated with its use. It is the
posedoftwoormoregypsumpanelproductsfactory-laminated
responsibility of the user of this standard to establish appro-
into a composite panel.
priate safety, health, and environmental practices and deter-
4.1.1 The individual gypsum panel products shall comply
mine the applicability of regulatory limitations prior to use.
with Specification C1278, C1396,or C1658.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4.2 Laminating adhesive shall be applied to either one or
ization established in the Decision on Principles for the
both of the surfaces being laminated.
Development of International Standards, Guides and Recom-
4.3 Factory-laminated gypsum panel products shall have a
mendations issued by the World Trade Organization Technical
flame spread index of not more than 25 when tested in
Barriers to Trade (TBT) Committee.
accordance with Test Method E84.
2. Referenced Documents 4.4 Factory-laminated gypsum panel products, type X (Spe-
2 cial Fire-Resistant):
2.1 ASTM Standards:
4.4.1 Factory-laminated gypsum panel products, type X,
C11 Terminology Relating to Gypsum and Related Building
designates factory-laminated gypsum panel products comply-
Materials and Systems
ing with this specification that provides not less than 1 h
C473 Test Methods for Physical Testing of Gypsum Panel
5 3
fire-resistance rating for panels ⁄8 in. [15.9 mm] thick or ⁄4 h
Products
fire-resistance rating for panels ⁄2 in. [12.7 mm] thick, applied
C1264 Specification for Sampling, Inspection, Rejection,
parallel with and on each side of load bearing 2 by 4 wood
Certification, Packaging, Marking, Shipping, Handling,
studs spaced 16 in. [406 mm] on centers with 6d coated nails,
and Storage of Gypsum Panel Products
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
centers with gypsum panel joints staggered 16 in. [406 mm] on
This test method is under the jurisdiction ofASTM Committee C11 on Gypsum
each side of the partition and tested in accordance with Test
and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
Methods E119.
Current edition approved Oct. 1, 2019. Published October 2019. Originally
approved in 2013. Last previous edition approved in 2015 as C1766 – 15. DOI:
5. Physical Properties
10.1520/C1766-15R19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 Specimens of factory-laminated gypsum panel products
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
shall be taken from the samples obtained in accordance with
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Specification C1264.
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