1/2"-4'X8' ORIENTED STRAND BOARD | Two-way nail lines at 16" & 24" Centers both ways to reduce application time. Use appropriate fasteners at the recommended schedule and gap panels 1/8" on the ends and edges of each panel. All edges are sealed for moisture and weather resistance. For Roof Applications; do not exceed the span limitations printed on each panel. Check local building codes for panel edge support requirements. Without edge support, you may need to decrease the support on-center spacing to less than the span rating of the panel. For wall applications Weyerhaeuser OSB sheathing panels meet all building code wall sheathing requirements for bending and racking strength without let-in bracing. Sheathing panels may be used vertically or horizontally as wall sheathing over studs at 24" O.C. maximum. When installing horizontally, block horizontal joints in panels that are used for bracing. Check local code for requirements. Other manufacturers may be substituted at times, Weyerha