ASTM C1921/C1921M-22

Standard Test Method for Comparative Impact Testing of Gypsum Panel Outside 90° Corner Systems

SIGNIFICANCE AND USE
5.1 This test method provides a repeatable methodology for evaluating outside 90° corner systems.
SCOPE
1.1 This test method details the method for a laboratory-based evaluation of aesthetic damage caused to a non-structural gypsum panel outside 90° corner system when impacted by a hard body. This test’s purpose is to provide comparative information on different gypsum panel corner systems to demonstrate aesthetic robustness and durability by minimizing initial damage.  
1.2 There is no known ISO equivalent to this standard.  
1.3 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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.

General Information

• Status: Published
• Publication Date: 30-Sep-2022
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C11 - Gypsum and Related Building Materials and Systems
• Drafting Committee: C11.02 - Specifications and Test Methods for Accessories and Related Products

Relations

• Refers: ASTM C754-20 - Standard Specification for Installation of Steel Framing Members to Receive Screw-Attached Gypsum Panel Products
• Effective Date: 01-May-2020

Standards Content (Sample)

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: C1921/C1921M − 22
Standard Test Method for
Comparative Impact Testing of Gypsum Panel Outside 90°
1
Corner Systems
This standard is issued under the fixed designation C1921/C1921M; 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 C475/C475MSpecification for Joint Compound and Joint
Tape for Finishing Gypsum Board
1.1 This test method details the method for a laboratory-
C645Specification for Nonstructural Steel Framing Mem-
basedevaluationofaestheticdamagecausedtoanon-structural
bers
gypsum panel outside 90° corner system when impacted by a
C754Specification for Installation of Steel Framing Mem-
hard body. This test’s purpose is to provide comparative
bers to Receive Screw-Attached Gypsum Panel Products
information on different gypsum panel corner systems to
C954SpecificationforSteelDrillScrewsfortheApplication
demonstrate aesthetic robustness and durability by minimizing
of Gypsum Panel Products or Metal Plaster Bases to Steel
initial damage.
Studs from 0.033 in. (0.84 mm) to 0.112 in. (2.84 mm) in
1.2 There is no known ISO equivalent to this standard.
Thickness
1.3 Units—The values stated in either SI units or inch- C1002Specification for Steel Self-Piercing Tapping Screws
for Application of Gypsum Panel Products or Metal
pound units are to be regarded separately as standard. The
values stated in each system are not necessarily exact equiva- Plaster Bases to Wood Studs or Steel Studs
C1047Specification forAccessories for Gypsum Wallboard
lents; therefore, to ensure conformance with the standard, each
system shall be used independently of the other, and values and Gypsum Veneer Base
C1396/C1396MSpecification for Gypsum Board
from the two systems shall not be combined.
F879SpecificationforStainlessSteelSocketButtonandFlat
1.4 This standard does not purport to address all of the
Countersunk Head Cap Screws
safety concerns, if any, associated with its use. It is the
2.2 AISI Standard:
responsibility of the user of this standard to establish appro-
S220NorthAmericanStandardforCold-formedSteelFram-
priate safety, health, and environmental practices and deter-
3
ing – non-structural members
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor- 2.3 Eurogypsum Standard:
dance with internationally recognized principles on standard- Drywall Jointing & Finishing SurfaceQuality Level Classi-
4
ization established in the Decision on Principles for the fications
Development of International Standards, Guides and Recom-
2.4 Gypsum Association Standards:
mendations issued by the World Trade Organization Technical
GA-214Recommended Levels of Finish: Gypsum Board,
5
Barriers to Trade (TBT) Committee.
Glass Mat & Fiber-Reinforced Gypsum Panels
GA-216Application and Finishing of Gypsum Panel Prod-
2. Referenced Documents 5
ucts
2
2.1 ASTM Standards:
3. Terminology
C11Terminology Relating to Gypsum and Related Building
Materials and Systems
3.1 Definitions—Definitions shall be in accordance with
Terminology C11 unless otherwise indicated.
1
3.2 Definitions of Terms Specific to This Standard:
ThistestmethodisunderthejurisdictionofASTMCommitteeC11onGypsum
and Related Building Materials and Systems and is the direct responsibility of
3.2.1 corner attachment method, n—as per the manufactur-
Subcommittee C11.02 on Specifications and Test Methods for Accessories and
er’s instructions and may be specific to the type of corner
Related Products.
Current edition approved Oct. 1, 2022. Published October 2022. Originally
approved in 2021. Last previous edition approved in 2021 as C1921/C1921M–21.
3
DOI: 10.1520/C1921_C1921M-22. Available from the American Iron and Steel Institute, 25 Massachusetts Ave.,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or NW, Suite 800, Washington, DC 20001, shop.steel.org.
4
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from eurogypsum.org.
5
Standards volume information, refer to the standard’s Document Summary page on Available from the Gypsum Association, 962 Wayne Ave., Suite 620, Silver
the ASTM website. Spring, MD 20910, gypsum.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C1921/C1921M − 22
protection, the most common methods of which include: 6. Interferences
embedding, na
...

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: C1921/C1921M − 21 C1921/C1921M − 22
Standard Test Method for
Comparative Impact Testing of Gypsum Panel Outside 90°
1
Corner Systems
This standard is issued under the fixed designation C1921/C1921M; 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
1.1 This test method details the method for a laboratory-based evaluation of aesthetic damage caused to a non-structural gypsum
panel outside 90° corner system when impacted by a hard body. This test’s purpose is to provide comparative information on
different gypsum panel corner systems to demonstrate aesthetic robustness and durability by minimizing initial damage.
1.2 There is no known ISO equivalent to this standard.
1.3 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in
each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C475/C475M Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
C645 Specification for Nonstructural Steel Framing Members
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
C1002 Specification for Steel Self-Piercing Tapping Screws for Application of Gypsum Panel Products or Metal Plaster Bases
to Wood Studs or Steel Studs
C1047 Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base
C1396/C1396M Specification for Gypsum Board
1
This test method is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.02 on Specifications and Test Methods for Accessories and Related Products.
Current edition approved Dec. 1, 2021Oct. 1, 2022. Published December 2021October 2022. Originally approved in 2021. Last previous edition approved in 2021 as
C1921/C1921M – 21. DOI: 10.1520/C1921-21.10.1520/C1921_C1921M-22.
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 ----------------------
C1921/C1921M − 22
F879 Specification for Stainless Steel Socket Button and Flat Countersunk Head Cap Screws
2.2 AISI Standard:
3
S220 North American Standard for Cold-formed Steel Framing – non-structural members
2.3 Eurogypsum Standard:
4
Drywall Jointing & Finishing Surface Quality Level Classifications
2.4 Gypsum Association Standards:
5
GA-214 Recommended Levels of Finish: Gypsum Board, Glass Mat & Fiber-Reinforced Gypsum Panels
5
GA-216 Application and Finishing of Gypsum Panel Products
3. Terminology
3.1 Definitions—Definitions shall be in accordance with Terminology C11 unless otherwise indicated.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 corner attachment method, n—as per the manufacturer’s instructions and may be specific to the type of corner protection,
the most common methods of which include: embedding, nailing, clinching, and stapling.
3.2.2 corner protection, n—product designed
...