ASTM C 473:2024

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.

91.060.10, 91.100.10