Osb Roof Sheathing Span Tables

For sanded plywood panels see table 3.

Osb roof sheathing span tables.

The oriented strand board osb substrate satisfies the provisions of. Always ensure your work site is compliant with current osha regulations. Osb design and application guide 5 span ratings span rating numbers for sheathing span and floor span indicate the maximum spacing of supports over which the panels should be placed. The span rating on sheathing span panels appears as two numbers separated by a slash e g 32 16 or 48 24.

Zip system sheathing load span tables. The typical thickness range for sheathing is 3 8 to 3 4 inch. Tables 2a through 2c apply to apa rated osb sheathing apa rated osb structural i sheathing and apa rated osb sturd i floor respectively. Zip system sheathing is a combination wood structural panel water resistive barrier and air barrier when used as wall sheathing.

Sheathing should be a minimum of 19 32 inch thick. Floor and roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. This video may depict some work practices that do not meet current safety standards. Uniform load deflection limitations 1 180 of span under live load plus dead load 1 240 under live load only.

When installed on the roof it replaces the need for felt as the roofing underlayment. 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. The first number is the maximum on center o c support. 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. 8d ring shank nails should be used instead. 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. Never attach roof sheathing with staples.

Avoid roof complaints with proper framing sheathing and roofing techniques. Osb and most other structural type sheathing must be installed continuously over two rafter joist truss spaces for the load rating to be valid. The values given in tables 1 and 2 represent the maximum allowable loads for plywood or osb.