To identify the performance level of Weyerhaeuser OSB panels, grade stamps are provided on one face of every panel. The stamp contains panel grade, allowable span ratings for various applications, installation info, applicable manufacturing standards, and the certifying agency. For information on reading Weyerhaeuser OSB grade stamps click on links below and refer to the back page of the guides.
FLOOR, ROOF, AND WALL PANEL INSTALLATION - OSB-4004
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