Roof Sheathing Thickness 24 Oc

Structurally in most cases exterior wall framing can easily be 24 in.

Roof sheathing thickness 24 oc.

Sheathing should be a minimum of 19 32 inch thick. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Floor and roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.

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. 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 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.

1 inch 25 4 mm 1 pound per square foot 0 0479 kn m 2. The typical thickness range for sheathing is 3 8 to 3 4 inch. Plywood sheathing typically has similar ratings. Applies to panels 24 inches or wider.

The thickness required by josh s circumstances are good for roof snow loads of up to 70 psf again spanning 24.