Roof Sheathing Thickness 24 Oc

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.

Roof sheathing thickness 24 oc.

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. 8d ring shank nails should be used instead. Never attach roof sheathing with staples. Sheathing should be a minimum of 19 32 inch thick.

Applies to panels 24 inches or wider. The typical thickness range for sheathing is 3 8 to 3 4 inch. Roof sheathing shall be structural wood panels plywood osb with a minimum five eighths inch thickness grade stamped for use and span. Floor and roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24. Plywood sheathing typically has similar ratings. 1 inch 25 4 mm 1 pound per square foot 0 0479 kn m 2. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.