ASTM C844-15

Standard Specification for Application of Gypsum Base to Receive<brk/> Gypsum Veneer Plaster

ABSTRACT
This specification covers the minimum requirements for, and methods of, application of gypsum veneer base for gypsum veneer plasters. 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. The materials shall be classified as follows: gypsum base for veneer plasters; gypsum backing board for coreboard; special fire-retardant gypsum base; foil-backed gypsum base; gypsum veneer plaster; nails; non-load bearing steel; load bearing steel; steel framing, non-load bearing; accessories; adhesives; steel framing load bearing; and wood framing. The maximum spacing of framing members for singly gypsum base construction shall be not more than then specified values. Application of gypsum base, single-ply gypsum base, adhesive-mechanical fastener, foil-backed gypsum base, two-ply gypsum base, and application over existing surfaces shall be indicated. Solid gypsum base partitions shall include face ply, core, and runners. Direct adhesive application shall be used only on interior masonry or concrete walls above grade, or inside of exterior masonry cavity walls. Gypsum base application over steel framing and furring shall include screw application, framing space, and screw spacing. Gypsum base applied to the soffit of arches shall be carefully bent into place and shall conform to the specified values of bending radii.
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 Methods C423, E90, or E492.  
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 Appendix X3).  
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.

General Information

• Status: Historical
• Publication Date: 31-Mar-2015
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C11 - Gypsum and Related Building Materials and Systems
• Drafting Committee: C11.03 - Specifications for the Application of Gypsum and Other Products in Assemblies

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:C844 −15
Standard Specification for
Application of Gypsum Base to Receive
1
Gypsum Veneer Plaster
This standard is issued under the fixed designation C844; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 2. Referenced Documents
2
1.1 Thisspecificationcoverstheminimumrequirementsfor,
2.1 ASTM Standards:
andmethodsof,applicationofgypsumveneerbaseforgypsum
C11 Terminology Relating to Gypsum and Related Building
veneer plasters.
Materials and Systems
C423 Test Method for SoundAbsorption and SoundAbsorp-
1.2 Gypsum veneer base shall not be used as a base for
tion Coefficients by the Reverberation Room Method
direct adhesive application of ceramic, metal, or plastic tile in
C514 Specification for Nails for the Application of Gypsum
areas exposed to abnormal moisture or humidity or tempera-
ture. Board
C587 Specification for Gypsum Veneer Plaster
1.3 Details of construction for a specific assembly to
C754 Specification for Installation of Steel Framing Mem-
achieve the required fire resistance shall be obtained from
bers to Receive Screw-Attached Gypsum Panel Products
reports of fire-resistance tests, engineering evaluations, or
C954 SpecificationforSteelDrillScrewsfortheApplication
listings from recognized fire testing laboratories.
of Gypsum Panel Products or Metal Plaster Bases to Steel
1.4 Where a specific degree of sound control is required for
Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in
veneer plaster assemblies and constructions, details of con-
Thickness
struction shall be in accordance with official reports of tests
C955 Specification for Load-Bearing (Transverse andAxial)
conducted in recognized sound testing laboratories in accor-
Steel Studs, Runners (Tracks), and Bracing or Bridging
dance with the applicable sound tests, Test Methods C423,
for Screw Application of Gypsum Panel Products and
E90,or E492.
Metal Plaster Bases
1.5 Where this specification is more stringent (size or
C1002 Specification for Steel Self-Piercing Tapping Screws
thickness of framing; spacing of fasteners) than the fire-rated for Application of Gypsum Panel Products or Metal
construction, this specification shall govern; otherwise, the
Plaster Bases to Wood Studs or Steel Studs
construction described in the fire test report shall govern. C1007 Specification for Installation of Load Bearing (Trans-
verse and Axial) Steel Studs and Related Accessories
1.6 Unheated spaces above gypsum veneer base ceilings
C1047 Specification for Accessories for Gypsum Wallboard
shall be properly ventilated (see Appendix X3).
and Gypsum Veneer Base
1.7 The values stated in inch-pound units are to be regarded
C1396/C1396M Specification for Gypsum Board
as the standard.The SI (metric) values given in parentheses are
C1546 Guide for Installation of Gypsum Products in Con-
approximate and are provided for information purposes only.
cealed Radiant Ceiling Heating Systems
1.8 The text of this standard references notes and footnotes E90 Test Method for Laboratory Measurement of Airborne
which provide explanatory material. These notes and footnotes
Sound Transmission Loss of Building Partitions and
(excluding those in tables and figures) shall not be considered
Elements
as requirements of the standard.
E492 Test Method for Laboratory Measurement of Impact
Sound Transmission Through Floor-Ceiling Assemblies
Using the Tapping Machine
1
This specification is under the jurisdiction of ASTM Committee C11 on
Gypsum and Related Building Materials and Systems and is the direct responsibility
ofSubcommitteeC11.03onSpecificationsfortheApplicationofGypsumandOther
2
Products in Assemblies. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2015. Published April 2015. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1978. Last previous edition approved in 2010 as C844 – 04 (2010). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C0844-15. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C844−15
2.2 American Softwood Lumber Standard: 4.10 Steel Framing, Non-load bearing—Specification C645
3
PS–20 American Softwood Lumber Standard for the specified design criteria.
4.11 Accessories—Specification C1047.
3. Terminology
4.12 Adhesive—For application of gypsum base to steel
3.1 Definitions
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C844 − 04 (Reapproved 2010) C844 − 15
Standard Specification for
Application of Gypsum Base to Receive
1
Gypsum Veneer Plaster
This standard is issued under the fixed designation C844; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
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 MethodMethods C423, Test Method E90, or Test Method E492.
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 Appendix X3).
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.
2. Referenced Documents
2
2.1 ASTM Standards:
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C423 Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method
C514 Specification for Nails for the Application of Gypsum Board
C587 Specification for Gypsum Veneer Plaster
3
C588/C588M Specification for Gypsum Base for Veneer Plasters (Withdrawn 2005)
C754 Specification for Installation of Steel Framing Members to Receive Screw-Attached Gypsum Panel Products
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 0.112 in. (2.84 mm) in Thickness
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
C1002 Specification for Steel Self-Piercing Tapping Screws for Application of Gypsum Panel Products or Metal Plaster Bases
to Wood Studs or Steel Studs
C1007 Specification for Installation of Load Bearing (Transverse and Axial) Steel Studs and Related Accessories
1
This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.03 on Specifications for the Application of Gypsum and Other Products in Assemblies.
Current edition approved May 15, 2010April 1, 2015. Published September 2010April 2015. Originally approved in 1978. Last previous edition approved in 20042010
as C844C844 – 04 (2010).–04. DOI: 10.1520/C0844-04R10.10.1520/C0844-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C844 − 15
C1047 Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base
C1396/C1396M Specification for Gypsum Board
C1546 Guide for Installation of Gypsum Products in Concealed Radiant Ceiling Heating Systems
E90 Test Method for Laboratory Meas
...