Roof Osb Sheathing 24 Truss Spacing

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

Roof osb sheathing 24 truss spacing.

It will support roof. Use a 10d box 0 128 inch by 3 inch nail as a spacer to gauge 1 8 inch edge and end spacing between panels. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.

May only be used where the roof live load design snow load is 40 psf or less. Apa e30 01 american plywood association engineered wood construction guide e 30 indicates that 7 16 osb for roof sheathing with supports 24 o c. The minimum osb panel size is 24 inches in any direction and each sheet end must rest on a rafter. That can mean costly time consuming callbacks.

Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. Each of these factors plays a role in determining how many nails you ll need to use per board during roof sheathing application. 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. I would first verify what you actually have by looking for a stamp on the roof sheathing.

Lay sheets in rows with the long edge horizontal to the roof bottom. Roof sheathing panel spacing hints. A structure s roof truss spacing can vary from every 12 to 24 inches. Plywood and oriented strand board osb like all wood products will expand or shrink slightly with changes in moisture content.

Provide a 1 8 inch gap. These little changes can effect the maximum spans allowed by code and you can find the label stamped on the sheathing. If the roof live load exceeds 40 psf alternate roof sheathing must be utilized. 1 2 inch osb or plywood roof sheathing is often sold with other thicknesses such as 7 16 inch or 15 32 inch.

Spacer type panel edge clips are available from some manufacturers.