Osb Roof Sheathing Span Tables

The values given in tables 1 and 2 represent the maximum allowable loads for plywood or osb.

Osb roof sheathing span tables.

The oriented strand board osb substrate satisfies the provisions of. When installed on the roof it replaces the need for felt as the roofing underlayment. I e if you have a cut piece that only lands on two rafters joists trusses then the manufacturer s stated span rating has probably been compromised. Apa rated sheathing span rating bond classification mill number apa panel grade product standard and panel grade hud recognition performance category apa rated osb sheathing roof panels performance category apa span rating allowable live load for roofs psf 3 8 24 0 30 7 16 24 16 40 15 32 32 16 70 1 2 32 16 70 19 32 40 20 130 23 32 48 24.

Tables 2a through 2c apply to apa rated osb sheathing apa rated osb structural i sheathing and apa rated osb sturd i floor respectively. The first number is the maximum on center o c support. For sanded plywood panels see table 3. Uniform load deflection limitations 1 180 of span under live load plus dead load 1 240 under live load only.

Apa trademarked osb is suitable for a variety of end uses including subflooring single layer flooring wall and roof sheathing sheathing ceiling deck structural insulated panels webs for wood i joists industrial containers mezzanine decks and furniture. Always ensure your work site is compliant with current osha regulations. Sheathing should be a minimum of 19 32 inch thick. This video may depict some work practices that do not meet current safety standards.

Floor and roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Never attach roof sheathing with staples. In some cases load capacities of rated sheathing and rated sturd i floor. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Page 6 of 7 v1 0 01 2008 osb roof design example calculations using asd 4x8 foot 24 16 teco sheathing span. 8d ring shank nails should be used instead. Osb and most other structural type sheathing must be installed continuously over two rafter joist truss spaces for the load rating to be valid. Avoid roof complaints with proper framing sheathing and roofing techniques.

Zip system sheathing is a combination wood structural panel water resistive barrier and air barrier when used as wall sheathing. Produced by apa the engineered wood association formerly the american plywood association in 1989. The typical thickness range for sheathing is 3 8 to 3 4 inch.