Roof Sheathing Thickness Osb

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. Osb roof decking thickness 7 16 1 2 or 5 8 currently we space rafters 16 oc and use 7 16 osb with h clips. Sheets of 7 16 inch thick with no edge support can be used in an area where the snow load is 30 pounds per square foot.

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With edge support and the same snow load 3 8 inch osb can be used.

Roof sheathing thickness osb.

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. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8.

Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Thermostat 7 16 cat ps2 10 osb sheathing application as 4 x 8. We re in dallas so we don t engineer for tremendous live loads for an asphalt shingle and we feel comfortable with 16 oc rafter spacing and 7 16 osb decking. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood.

For pricing and availability. For pricing and availability. 1 inch 25 4 mm. Allowable spans for lumber floor and roof sheathing a b for si.

Oriented strand board 660663 the home depot. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Roof sheathing or decking is one of those elements. Thicknesses range from 5 16 to 3 4 inch and the proper one to use.

Provides exceptional dimensional stability and stiffness. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. Oriented strand board is an excellent choice for roof deck wall and subfloor sheathing. Most roofs will be sheathed in plywood at least 3 8 inch thick.

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