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The second number is the maximum o c.
Osb roof sheathing thickness canada. Shop osb top brands at lowe s canada online store. For the curious 7 16 osb has a span rating of 24 16 and with supports every 24 inches is good for a roof live load of 40 psf pounds per square foot with a 10 psf dead load. 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.
Spacing in inches for roof sheathing. In addition design values for osb construction sheathing are listed in csa o86 allowing for engineering design of roof sheathing wall sheathing and floor sheathing using osb conforming to csa o325. Panel thickness will also affect permeability using the 2 perm variable of 7 16ths osb sheathing at 3 4 thickness the permeability drops to 2 3rds of a perm. A panel marked 32 16 may be used for roof sheathing over supports spaced up to 32 inches o c.
Never attach roof sheathing with staples. Support spacing when the panel is used for subflooring. The greater ability a wall has to dry the more durable it will be and everyone. Plywood s advantage over osb.
The ontario building code thickness or rating 9 23 15 7. Compare products read reviews get the best deals. Scroll down 01. Thickness or rating 1 the thickness or rating of roof sheathing on a flat roof used as a walking deck shall conform to either table 9 23 14 5 a.
Sheathing should be a minimum of 19 32 inch thick. 2 the thickness or rating of roof sheathing on a roof not used as a walking deck shall conform to either table 9 23 15 7 a. Or for floor sheathing over supports spaced up to 16 inches o c. Price match guarantee free shipping on eligible orders.
That in a nutshell is the one big advantage plywood holds over osb. The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24. Thicknesses range from 5 16 to 3 4 inch and the proper. Installation manual zip system sheathing wall and roof zip system sheathing and tape fact sheet integrated sheathing or housewrap white paper zip system brand brochure house of brands brochure view all.
Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.
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