1. Scope
1.1 This specification covers the minimum requirements for, and methods of,
application of gypsum veneer base for gypsum veneer plasters.
1.2 Gypsum veneer base shall not be used as a base for direct adhesive
application of ceramic, metal, or plastic tile in areas exposed to abnormal
moisture or humidity or temperature.
1.3 Details of construction for a specific assembly to achieve the required
fire resistance shall be obtained from reports of fire-resistance tests,
engineering evaluations, or listings from recognized fire testing laboratories.
1.4 Where a specific degree of sound control is required for veneer plaster
assemblies and constructions, details of construction shall be in accordance
with official reports of tests conducted in recognized sound testing
laboratories in accordance with the applicable sound tests, Test Method C 423,
Test Method E 90, or Test Method E 492.
1.5 Where this specification is more stringent (size or thickness of framing;
spacing of fasteners) than the fire-rated construction, this specification shall
govern; otherwise, the construction described in the fire test report shall
govern.
1.6 Unheated spaces above gypsum veneer base ceilings shall be properly
ventilated (see ).
1.7 The values stated in inch-pound units are to be regarded as the standard.
The SI (metric) values given in parentheses are approximate and are provided for
information purposes only.
1.8 The text of this standard references notes and footnotes which provide
explanatory material. These notes and footnotes (excluding those in tables and
figures) shall not be considered as requirements of the standard. 9 pp.
2. Referenced Documents
C587
Specification for Gypsum Veneer Plaster
C514
Specification for Nails for the Application of Gypsum Board
C1007
Specification for Installation of Load Bearing Transverse and Axial
E492
Test Method for Laboratory Measurement of Impact Sound Transmission Through
Floor-Ceiling Assemblies Using the Tapping Machine
E90
Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of
Building Partitions and Elements
C1546
Guide for Installation of Gypsum Products in Concealed Radiant Ceiling Heating
Systems
C1047
Specification for Installation of Load Bearing (Transverse and Axial) Steel
Studs and Related Accessories
C1002
Specification for Steel Self-Piercing Tapping Screws for the Application of
Gypsum Panel Products or Metal Plaster Bases to Wood Studs or Steel Studs
C955
Specification for Load-Bearing (Transverse and Axial) Steel Studs, Runners
(Tracks), and Bracing or Bridging for Screw Application of Gypsum Panel Products
and Metal Plaster Bases
C954
Specification for Steel Drill Screws for the Application of Gypsum Panel
Products or Metal Plaster Bases to Steel Studs from 0.033 in. (0.84 mm) to 0.012
in. (2.84 mm) in Thickness
C423
Test Method for Sound Absorption and Sound Absorption Coefficients by the
Reverberation Room Method
C11
Terminology Relating to Gypsum and Related Building Materials and Systems
C754
Specification for Installation of Steel Framing Members to Receive
Screw-Attached Gypsum Panel Products
PS-20 American Softwood Lumber Standard
C588 Specification for Gypsum Base for Veneer Plasters
ASTM C844-04 Standard Specification for Application of Gypsum Base to Receive Gypsum Veneer Plaster
