Osb Roof Sheathing Thickness Canada

In canada osb panels are manufactured to meet the requirements of the csa o325 standard. Thermostat 7 16 cat ps2 10 osb sheathing application as 4 x 8. 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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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.

Osb roof sheathing thickness canada.

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. Thicknesses range from 5 16 to 3 4 inch and the proper one to use. Plywood s advantage over osb.

The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24. The ontario building code thickness or rating 9 23 15 7. 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. And remember that those are the higher of the estimated perm numbers and the best case scenario once a weather barrier is on.

For pricing and availability. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. The wafers or strands used in the manufacture of osb are generally up to 150 mm 6 in long in the grain direction 25 mm 1 in wide and less than 1 mm 1 32 in thickness. A panel marked 32 16 may be used for roof sheathing over supports spaced up to 32 inches o c.

The typical thickness range for sheathing is 3 8 to 3 4 inch. Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8. For pricing and availability. 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.

8d ring shank nails should be used instead. Sheathing should be a minimum of 19 32 inch thick. Never attach roof sheathing with staples. The span rating on floor span panels appears as a single.