Plywood Roof Sheathing Span Rating

That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

Plywood roof sheathing span rating. Panels and lap siding bearing a span rating of 24 oc may be used direct to studs 24 inches on center. Most roofs will be sheathed in plywood at least 3 8 inch thick. The span ratings for apa rated sturd i floor and underlayment panels like those for apa rated sheathing are based on application of the panel with the long dimension or strength axis across three or more supports. Loads will vary with the pitch of the roof.

Sheathing panels 3 8 category may be installed perpendicular or parallel to supports spaced a maximum of 16 o c and will support a 30 psf live load without exceeding a deflection limit of 1 180. Panels are available that carry apa series mobile home roof sheathing rating n 216r. Uniform loads psf on unsanded span rated plywood panels multi span normal duration of load dry conditions face grain parallel to supports span load face grain across supports span center to center rating governed span center to center of supports inches of supports inches by 12 16 19 2 24 30 32 36 40 48 60 12 16 24 l 360 92 37 21 10 8 3. Typical size is 4 ft x 8 ft but other sizes may also be produced.

All rated siding panels may be applied horizontally direct to studs 16 or 24 inches on center provided horizontal joints are blocked. Multi span normal duration of load dry conditions panels 24 inches or wider span rating b load governed by c strength axis a perpendicular to supports span center to center of supports inches parallel to supports span center to center of supports inches 12 16 19 2 24 30 32 36 40 48 60 12 16 24. Uniform loads psf on apa rated plywood sheathing. Allowable load at maximum span.

Apa rated sheathing panels are produced as plywood or oriented strand board osb. The span rating on apa rated sturd i floor underlayment and apa rated siding panels appears as a single number. Panels and lap siding with a span rating of 16 oc may be applied direct to studs spaced 16 inches on center.