Irc 2015 Roof Sheathing Thickness

The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.

Irc 2015 roof sheathing thickness.

The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. Sheathing should be a minimum of 19 32 inch thick. Cap nail shank and cap staple legs shall have a length sufficient to penetrate through the roof sheathing or not less than 3 4 inch into the roof. Each manufacturer shall publish the allowable maximum loads and spans for service as floor and roof sheathing for their treatment.

The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Fasteners for asphalt shingles shall be galvanized stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 2 67 mm shank with a minimum 3 8 inch diameter 9 5 mm head of a length to penetrate through the roofing materials and a minimum of 3 4 inch 19 1 mm into the roof sheathing. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

51 mm nominal thickness and not less in depth than the cut end of the rafter. 8d ring shank nails should be used instead. Never attach roof sheathing with staples. Where the roof sheathing is less than 3 4 inch 19 1 mm thick the nails.

Cap flashing shall be. 0 5 mm thickness or mineral surfaced roll roofing weighing not less than 77 pounds per 100 square feet 4 kg m 2. Los angeles building code 15 roof assemblies and rooftop structures 1507 requirements for roof coverings 1507 8 wood shingles 1507 8 1 deck requirements 1507 8 1 1 solid sheathing required a304 4 1 1 prescriptive provisions for seismic strengthening of cripple walls and sill plate anchorage of light wood frame residential buildings. International residential code 2015 irc 2015.

The typical thickness range for sheathing is 3 8 to 3 4 inch. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.