AC417 1/2-inch Sag-resistant Gypsum Ceiling Board—Approved January 2019, editorially revised October 2024 (PDF Download)

Item #: AC417 10-2024
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AC417 establishes guidelines for evaluation of 1/2-inch-thick sag-resistant gypsum ceiling board meeting or exceeding the humidified deflection performance requirements of Section 12 of ASTM C1396, installed using proprietary fastening specifications to achieve enhanced sag resistance.
More Information
Pages 5
Publisher ICC-ES
Language English
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