Roof Sheathing Thickness 24 Oc

The exception according to the 2015 irc is 2 6 walls supporting two full floors plus a roof assembly above or 2 4 walls supporting one floor plus a roof assembly above zip sheathing can typically be.

Roof sheathing thickness 24 oc.

Never attach roof sheathing with staples. Plywood sheathing typically has similar ratings. Applies to panels 24 inches or wider. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Roof sheathing shall be structural wood panels plywood osb with a minimum five eighths inch thickness grade stamped for use and span. 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. The typical thickness range for sheathing is 3 8 to 3 4 inch. Secure roof sheathing panels to the roof framing with 8d common nails spaced six inches on center at the edges and twelve inches on center at intermediate supports.

Sheathing should be a minimum of 19 32 inch thick. 8d ring shank nails should be used instead. Floor and roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.

1 inch 25 4 mm 1 pound per square foot 0 0479 kn m 2.