ASTM C473-05

Standard Test Methods for Physical Testing of Gypsum Panel Products

SCOPE
1.1 These test methods cover the physical testing of gypsum panel products.
1.2 The test methods appear in the following order:SectionFlexural Strength (Method A)7Core, End and Edge Hardness (Method A)8Nail Pull Resistance (Method A)9Flexural Strength (Method B)11Core, End and Edge Hardness (Method B)12Nail Pull Resistance (Method B)13Humidified Deflection14End Squareness15Nominal Thickness16Recessed- or Tapered Edge Depth17Width18Length19Water Resistance of Core-Treated Water-Repellent Gypsum Panel Products20 Surface Water Resistance of Gypsum Panel Products with Water-Repellent Surfaces21
1.3 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.
1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Nov-2005
• 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 C473-03 - Standard Test Methods for Physical Testing of Gypsum Panel Products
• Effective Date: 01-Dec-2005
• Replaced By: ASTM C473-06 - Standard Test Methods for Physical Testing of Gypsum Panel Products
• Effective Date: 01-Jun-2006
• Referred By: ASTM C1396/C1396M-17 - Standard Specification for Gypsum Board
• Effective Date: 01-Dec-2005
• Referred By: ASTM C1766-15(2019) - Standard Specification for Factory-Laminated Gypsum Panel Products
• Effective Date: 01-Dec-2005
• Referred By: ASTM C1355/C1355M-96(2020) - Standard Specification for Glass Fiber Reinforced Gypsum Composites
• Effective Date: 01-Dec-2005
• Referred By: ASTM C1629/C1629M-23 - Standard Classification for Abuse-Resistant Nondecorated Interior Gypsum Panel Products and Fiber-Reinforced Cement Panels
• Effective Date: 01-Dec-2005
• Referred By: ASTM C1177/C1177M-17 - Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing
• Effective Date: 01-Dec-2005
• Referred By: ASTM C1178/C1178M-18 - Standard Specification for Coated Glass Mat Water-Resistant Gypsum Backing Panel
• Effective Date: 01-Dec-2005
• Referred By: ASTM C1278/C1278M-17 - Standard Specification for Fiber-Reinforced Gypsum Panel
• Effective Date: 01-Dec-2005
• Referred By: ASTM C318/C318M-13(2018) - Standard Specification for Gypsum Formboard
• Effective Date: 01-Dec-2005
• Referred By: ASTM C587-04(2018) - Standard Specification for Gypsum Veneer Plaster
• Effective Date: 01-Dec-2005
• Referred By: ASTM C11-23 - Standard Terminology Relating to Gypsum and Related Building Materials and Systems
• Effective Date: 01-Dec-2005
• Referred By: ASTM C1789-14(2018) - Standard Test Method for Calibration of Hand-Held Moisture Meters on Gypsum Panels
• Effective Date: 01-Dec-2005
• Referred By: ASTM C1658/C1658M-19e1 - Standard Specification for Glass Mat Gypsum Panels
• Effective Date: 01-Dec-2005

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: C 473 – 05
Standard Test Methods for
1
Physical Testing of Gypsum Panel Products
This standard is issued under the fixed designation C 473; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* D 3285 Test Method for WaterAbsorptiveness of Nonbibu-
lous Paper and Paperboard (Cobb Test)
1.1 These test methods cover the physical testing of gypsum
E4 Practices for Force Verification of Testing Machines
panel products.
1.2 The test methods appear in the following order:
3. Terminology
Section
3.1 Definitions used in these test methods are in accordance
Flexural Strength (Method A) 7
Core, End and Edge Hardness (Method A) 8
with TerminologyC11.
Nail Pull Resistance (Method A) 9
3.2 Definitions of Terms Specific to This Standard:
Flexural Strength (Method B) 11
3.2.1 edge, n—the paper-bound edge, or long edge, as
Core, End and Edge Hardness (Method B) 12
Nail Pull Resistance (Method B) 13
manufactured.
Humidified Deflection 14
3.2.2 ends, n—the end perpendicular to the paper-bound
End Squareness 15
edge or long edge.
Nominal Thickness 16
Recessed- or Tapered Edge Depth 17
Width 18
4. Sampling
Length 19
4.1 For use in these test methods, a sample shall consist of
Water Resistance of Core-Treated Water-Repellent
Gypsum Panel Products 20
not less than 0.25 % of the number of gypsum panel products
Surface Water Resistance of Gypsum Panel Products
in a shipment, but not less than three gypsum panel products.
with Water-Repellent Surfaces 21
Test specimens shall be taken from the sample lot as indicated
1.3 The text of these test methods references notes and
in each method.
footnotes that provide explanatory material. These notes and
footnotes, excluding those in tables and figures, shall not be 5. Conditioning
considered as requirements of these test methods.
5.1 Conditionspecimenstoconstantweightatatemperature
1.4 This standard does not purport to address all of the
of 85 6 15 °F (29.5 6 8.5 °C) and relative humidity of 50 6
safety concerns, if any, associated with its use. It is the
2% (Note 1). Test specimens individually after constant
responsibility of the user of this standard to establish appro-
weight is reached and within 10 min upon removal from the
priate safety and health practices and determine the applica-
conditioning chamber.
bility of regulatory limitations prior to use.
NOTE 1—Laboratory test results indicated that conditioning tempera-
tures may range from 70 to 100 °F (21 to 38 °C) without significantly
2. Referenced Documents
affecting the results. However, relative humidity is critical. This is the
2
2.1 ASTM Standards:
reason for testing specimens within 10 min upon removal from the
C11 Terminology Relating to Gypsum and Related Build-
conditioning chamber.
ing Materials and Systems
Method A—Constant Rate of Loading
INTRODUCTION
1
These test methods are under the jurisdiction of ASTM Committee C11 on
The following procedures are applicable to so-called “shot
Gypsum and Related Building Materials and Systems and are the direct responsi-
machines” that utilize lead or steel shot that applies a load to
bility of Subcommittee C11.01 on Specifications and Test Methods for Gypsum
the specimen at a constant stress rate or any other device that
Products.
applies the load at a constant stress rate.
Current edition approved Dec. 1, 2005. Published December 2005. Originally
approved in 1961. Last previous edition approved in 2003 as C 473 – 03.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6. Apparatus—Method A
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.1 Testing Machine—Apply the test load at a uniform rate
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of 1 lbf/s (4.45 N/s) 610 %. Apply the load with a device
*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

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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.
C473–05
independent of manual control of the rate of loading during an ends and edges of the gypsum panel product except where the
individual sample test (see Fig. 1). The deformation of the product is 24-in. or less in width, where it is impossible to do
specimen controls the cross head speed. so.
7.5.2 Condition specimens in accordance with Section 5.
7.6 Procedure:
7.
...