1、GA-229-08 Copyright Gypsum Association 2008. All rights reserved. Printed in the U.S.A. SHEAR VALUES FOR SCREW APPLICATION OF GYPSUM BOARD ON WALLS (GA-229-08) A series of tests was conducted in accordance with ASTM E 72 to determine the shear resistance of gypsum board applied to one side of wood s
2、tud partitions 16 in. (406 mm) o.c. using Type S or W screws at different spacings. Parallel and perpendicular applications, with horizontal joints unblocked, were evaluated. The results are summarized below. These values represent average ultimate shear. Appropriate safety factors should be conside
3、red for design use. Board Thickness in. (mm) Direction of Application Screw Type Edge Screw Spacing in. (mm) o.c. Field Screw Spacing in. (mm) o.c. Average Ultimate Shear. lbs/ft (kg/m) Test Report Number/Date* (12.7) Parallel 1“ (32 mm) W #6 4 (102) 16 (406) 485 (723) WHI-651-0253.02, Test A; 8/1/8
4、8 8/1/88 & 8/2/88 (12.7) Parallel 1“ (32 mm) W #6 8 (203) 12 (305) 215 (320) RAD-551, 9/85 (12.7) Perpendicular 1“ (32 mm) W #6 8 (203) 12 (305) 184 (274) RAD-552, 9/85 (12.7) Parallel 1“ (32 mm) S #6 8 (203) 12 (305) 225 (335) RAD-555, 9/85 (12.7) Parallel 1“ (32 mm) W #6 6 (153) 12 (305) 269 (401)
5、 RAD-555, 9/85 (12.7) Parallel 1“ (32 mm) W #6 12 (305) 12 (305) 169 (252) RAD-555, 9/85 (15.9) Parallel 1“ (32 mm) W #6 8 (203) 12 (305) 281 (417) RAD-553, 9/85 (15.9) Perpendicular 1“ (32 mm) W #6 8 (203) 12 (305) 215 (320) RAD-554, 9/85 * = WHI - Inchcape Testing Services/Warnock Hersey (now Inte
6、rtek Testing Services, Inc.) RAD - Resources Applications, Designs, and Controls, Inc. (RADCO) = Studs spaced 24 in. (610 mm) = Check test, only one specimen tested. The following conclusions can be drawn from these tests: All other conditions being equal, 1. Shear values are comparable for both Typ
7、e S and W screws, 2. Shear values for parallel application exceed those for perpendicular application, 3. Shear values for in. (15.9 mm) gypsum board exceed those for in. (12.7 mm) gypsum board, 4. Shear values increase with closer spacing of perimeter fasteners, and 5. When compared to other shear
8、test results, shear values for screws are higher than for nails. This document may be revised or withdrawn from circulation at any time. The status of the document should be verified by the user prior to following any recommendations contained herein. To verify that you have the most current edition
9、 of the document, access the Gypsum Association website at: www.gypsum.org. GYPSUM ASSOCIATION 810 First Street NE, #510 Washington, DC 20002 202-289-5440 Fax: 202-289-3707 www.gypsum.org MEMBER COMPANY LIST 2008 AMERICAN GYPSUM LAFARGE NORTH AMERICA INC. CERTAINTEED GYPSUM, INC. NATIONAL GYPSUM COMPANY CERTAINTEED GYPSUM CANADA, INC. PABCO GYPSUM CGC INC. a division of PABCO building products, LLC FEDERAL GYPSUM COMPANY TEMPLE-INLAND FOREST PRODUCTS CORP. G-P GYPSUM LLC UNITED STATES GYPSUM COMPANY
