ASTM C473-19

Standard Test Methods for Physical Testing of Gypsum Panel Products

ABSTRACT
These test methods cover the physical testing of gypsum panel products. The test methos appear in the following order: (1) flexural strength (Method A); (2) core, end, and edge hardness (Method A); (3) nail pull resistance (Method A); (4) humidified deflection; (5) end squareness; (6) nominal thickness; (7) recessed- or tapered-edge depth; (8) width; (9) length; (10) water resistance of core-treated water repellant gypsum panel products; and (11) surface water resistance of gypsum panel products with water-repellant surfaces. For use in these test methods, a sample shall consist of gypsum panel products. Flexural properties of gypsum panel products are evaluated by supporting the specimen near the ends and applying a transverse load midway between the supports. The core, end, and edge hardness of gypsum panel products is evaluated by determining the force required to push a steel punch into the area of test. The ability of gypsum panel products to resist nail pull-through is evaluated by determining the loaded required to push a standard nail head through the product. The humidified deflection of gypsum panel products is evaluated by supporting a specimen that has been cut with the long dimension perpendicular to the machine detection, supported horizontally, and subjected to high humidity.
SCOPE
1.1 These test methods cover the physical testing of gypsum panel products.  
1.2 The test methods appear in the following order:    
Section  
Flexural Strength (Method A)  
7  
Core, End and Edge Hardness (Method A)  
8  
Nail Pull Resistance (Method A)  
9  
Flexural Strength (Method B)  
11  
Core, End and Edge Hardness (Method B)  
12  
Nail Pull Resistance (Method B)  
13  
Humidified Deflection  
14  
End Squareness  
15  
Nominal Thickness  
16  
Recessed- or Tapered Edge Depth  
17  
Width  
18  
Length  
19  
Water Resistance of Core-Treated Water-Repellent
Gypsum Panel Products  
20  
Surface Water Resistance of Gypsum Panel Products
with Water-Repellent Surfaces  
21  
1.3 The values stated in inch-pound units are to be regarded as standard with the exception of weight of samples in SI gram units. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.4 The text of these test methods references notes and footnotes that provide explanatory material. These notes and footnotes, excluding those in tables and figures, shall not be considered as requirements of these test methods.  
1.5 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.  
1.6 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-2019
• 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 C473-17 - Standard Test Methods for Physical Testing of Gypsum Panel Products
• Effective Date: 01-Oct-2019
• Refers: ASTM E4-14 - Standard Practices for Force Verification of Testing Machines
• Effective Date: 01-Jun-2014
• Refers: ASTM C11-15 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Apr-2015
• Refers: ASTM C11-15a - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Oct-2015
• Refers: ASTM C11-16 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 15-May-2016
• Refers: ASTM C11-17 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 15-May-2017
• Refers: ASTM C11-17a - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Oct-2017
• Refers: ASTM C11-18 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Jun-2018
• Refers: ASTM C11-18a - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Oct-2018
• Refers: ASTM C1264-14a - Standard Specification for Sampling, Inspection, Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage of Gypsum Panel Products
• Effective Date: 01-Sep-2014
• Referred By: ASTM C1658/C1658M-19e1 - Standard Specification for Glass Mat Gypsum Panels
• Effective Date: 01-Oct-2019
• Referred By: ASTM C1396/C1396M-17 - Standard Specification for Gypsum Board
• Effective Date: 01-Oct-2019
• Referred By: ASTM C1278/C1278M-17 - Standard Specification for Fiber-Reinforced Gypsum Panel
• Effective Date: 01-Oct-2019
• Referred By: ASTM C1355/C1355M-96(2020) - Standard Specification for Glass Fiber Reinforced Gypsum Composites
• Effective Date: 01-Oct-2019
• Referred By: ASTM C318/C318M-13(2018) - Standard Specification for Gypsum Formboard
• Effective Date: 01-Oct-2019
• Referred By: ASTM C1177/C1177M-17 - Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing
• Effective Date: 01-Oct-2019
• Referred By: ASTM C1766-15(2019) - Standard Specification for Factory-Laminated Gypsum Panel Products
• Effective Date: 01-Oct-2019
• Referred By: ASTM C1789-14(2018) - Standard Test Method for Calibration of Hand-Held Moisture Meters on Gypsum Panels
• Effective Date: 01-Oct-2019
• Referred By: ASTM C1178/C1178M-18 - Standard Specification for Coated Glass Mat Water-Resistant Gypsum Backing Panel
• Effective Date: 01-Oct-2019
• Referred By: ASTM C11-23 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Oct-2019
• Referred By: ASTM C1629/C1629M-23 - Standard Classification for Abuse-Resistant Nondecorated Interior Gypsum Panel Products and Fiber-Reinforced Cement Panels
• Effective Date: 01-Oct-2019
• Referred By: ASTM C587-04(2018) - Standard Specification for Gypsum Veneer Plaster
• Effective Date: 01-Oct-2019

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: C473 − 19
Standard Test Methods for
1
Physical Testing of Gypsum Panel Products
This standard is issued under the fixed designation C473; 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* mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 These test methods cover the physical testing of gypsum
panel products.
2. Referenced Documents
2
1.2 The test methods appear in the following order:
2.1 ASTM Standards:
Section C11 Terminology Relating to Gypsum and Related Building
Flexural Strength (Method A) 7
Materials and Systems
Core, End and Edge Hardness (Method A) 8
C1264 Specification for Sampling, Inspection, Rejection,
Nail Pull Resistance (Method A) 9
Flexural Strength (Method B) 11
Certification, Packaging, Marking, Shipping, Handling,
Core, End and Edge Hardness (Method B) 12
and Storage of Gypsum Panel Products
Nail Pull Resistance (Method B) 13
E4 Practices for Force Verification of Testing Machines
Humidified Deflection 14
End Squareness 15
E177 Practice for Use of the Terms Precision and Bias in
Nominal Thickness 16
ASTM Test Methods
Recessed- or Tapered Edge Depth 17
E691 Practice for Conducting an Interlaboratory Study to
Width 18
Length 19 Determine the Precision of a Test Method
Water Resistance of Core-Treated Water-Repellent 3
2.2 Other Standards:
Gypsum Panel Products 20
TAPPI T441 WaterAbsorptiveness of Sized (Non-Bibulous)
Surface Water Resistance of Gypsum Panel Products
with Water-Repellent Surfaces 21
Paper, Paperboard, and Corrugated Fiberboard (Cobb
Test)
1.3 The values stated in inch-pound units are to be regarded
as standard with the exception of weight of samples in SI gram
3. Terminology
units. The values given in parentheses are mathematical
3.1 Definitions used in these test methods are in accordance
conversions to SI units that are provided for information only
with Terminology C11.
and are not considered standard.
3.2 Definitions of Terms Specific to This Standard:
1.4 The text of these test methods references notes and
3.2.1 edge, n—the paper-bound edge, or long edge, as
footnotes that provide explanatory material. These notes and
manufactured.
footnotes, excluding those in tables and figures, shall not be
considered as requirements of these test methods.
3.2.2 ends, n—the end perpendicular to the paper-bound
edge or long edge.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.2.3 Test Uncertainty Ratio (TUR),n—(tolerance of mea-
responsibility of the user of this standard to establish appro- sure) / (precision of the standard measuring instrument)
priate safety, health, and environmental practices and deter-
4. Sampling
mine the applicability of regulatory limitations prior to use.
4.1 Testspecimensshallbetakenfromthesamplesobtained
1.6 This international standard was developed in accor-
in accordance with Specification C1264.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Conditioning
Development of International Standards, Guides and Recom-
5.1 Conditionspecimenstoconstantweightatatemperature
of 85 6 15 °F (29.5 6 8.5 °C) and relative humidity of 50 6
1
These test methods are under the jurisdiction of ASTM Committee C11 on
2
Gypsum and Related Building Materials and Systems and are the direct responsi- For referenced ASTM standards, visit the ASTM website, www.astm.org, or
bility of Subcommittee C11.01 on Specifications and Test Methods for Gypsum contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Products. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Oct. 1, 2019. Published October 2019. Originally the ASTM website.
3
approved in 1961. Last previous edition approved in 2017 as C473 – 17. DOI: Available from TechnicalAssociation of the Pulp and Paper Industry (TAPPI),
10.1520/C0473-19. 15 Technology Parkway South, Norcross, GA 30092, http://www.tappi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C473 − 19
2% (Note 1). Test specimens individually after constant of surface contact with the specimen. The supports shall be
weight is reached
...

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: C473 − 17 C473 − 19
Standard Test Methods for
1
Physical Testing of Gypsum Panel Products
This standard is issued under the fixed designation C473; 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 These test methods cover the physical testing of gypsum panel products.
1.2 The test methods appear in the following order:
Section
Flexural Strength (Method A) 7
Core, End and Edge Hardness (Method A) 8
Nail Pull Resistance (Method A) 9
Flexural Strength (Method B) 11
Core, End and Edge Hardness (Method B) 12
Nail Pull Resistance (Method B) 13
Humidified Deflection 14
End Squareness 15
Nominal Thickness 16
Recessed- or Tapered Edge Depth 17
Width 18
Length 19
Water Resistance of Core-Treated Water-Repellent
Gypsum Panel Products 20
Surface Water Resistance of Gypsum Panel Products
with Water-Repellent Surfaces 21
1.3 The values stated in inch-pound units are to be regarded as standard with the exception of weight of samples in SI gram
units. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not
considered standard.
1.4 The text of these test methods references notes and footnotes that provide explanatory material. These notes and footnotes,
excluding those in tables and figures, shall not be considered as requirements of these test methods.
1.5 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.
1.6 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
C1264 Specification for Sampling, Inspection, Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage of
Gypsum Panel Products
E4 Practices for Force Verification of Testing Machines
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
1
These test methods are under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and are the direct responsibility of
Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products.
Current edition approved Oct. 1, 2017Oct. 1, 2019. Published November 2017October 2019. Originally approved in 1961. Last previous edition approved in 20162017
as C473 – 16.C473 – 17. DOI: 10.1520/C0473-17.10.1520/C0473-19.
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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C473 − 19
3
2.2 Other Standards:
TAPPI T441 Water Absorptiveness of Sized (Non-Bibulous) Paper, Paperboard, and Corrugated Fiberboard (Cobb Test)
3. Terminology
3.1 Definitions used in these test methods are in accordance with Terminology C11.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 edge, n—the paper-bound edge, or long edge, as manufactured.
3.2.2 ends, n—the end perpendicular to the paper-bound edge or long edge.
3.2.3 Test Uncertainty Ratio (TUR),n—(tolerance of measure) / (precision of the standard measuring instrument)
4. Sampling
4.1 For use in these test methods, a sample shall consist of not less than 0.25 % of the number of gypsum panel products in
a shipment, but not less than three gypsum panel products. Test specimens shall be taken from the sample lot as indicated in each
method.samples obtained in accordance with Specification C1264.
5. Conditio
...