Osb Roof Sheathing Thickness

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

Osb roof sheathing thickness.

With this thickness any deflection under dead loads only the weight of materials only should prove to be imperceptible. Thicknesses range from 5 16 to 3 4 inch and the proper one to use. A flatter roof with rafters farther apart may need a thickness of up to inch. Roof sheathing or decking is one of those elements.

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. 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. With edge support and the same snow load 3 8 inch osb can be used. I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it.

In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Watch this now to learn how to avoid this same pr. Loads will vary with the.

Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. What size plywood for the roof. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick.

Allowable spans for lumber floor and roof sheathing a b for si. When this is the case experts recommend a 5 8 inch thick sheet. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.