Plywood Roof Sheathing Span Rating

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Image Result For Plywood Span Rating Tongue And Groove Panelling Tongue And Groove Lumber

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Roof Sheathing Calculator Estimate The Plywood Needed For A Roof Roof Sheathing Roofing Roofing Options

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Uniform loads psf on apa rated plywood sheathing.

Plywood roof sheathing span rating.

That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Loads will vary with the pitch of the roof. 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. The span rating on apa rated sturd i floor underlayment and apa rated siding panels appears as a single number.

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. Commonly square edge but may be produced with tongue and groove edges. 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. 2 4 common performance categories and corresponding span ratings performance category span rating 3 8 24 0 7 16 24 16.

Allowable uniform load based on deflection of 1 360 of span is 100 pounds per square foot except the span rating of 48 inches on center is based on a total load of 65 pounds per square foot. Allowable load at maximum span. Most roofs will be sheathed in plywood at least 3 8 inch thick. Apa rated sheathing panels are produced as plywood or oriented strand board osb.

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. All rated siding panels may be applied horizontally direct to studs 16 or 24 inches on center provided horizontal joints are blocked.

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