2009 Irc Roof Sheathing

According to 2009 irc table r803 1 minimum thickness of lumber roof sheathing.

2009 irc roof sheathing.

Where the roof sheathing is less than 3 4 inch 19 mm thick the. And for wood structural panel sheathing r803 2 2 allowable spans. You would go to table r503 2 1 1 1 to determine minimum nominal panel thickness. January 2009 code for residential buildings that creates minimum regulations for one and two family dwellings of three stories or less.

Roof sheathing fastening schedulea b c d e 8d common 0 131 x 2 1 2 inches or ring shank 0 135 x 2 1 2 inches except where noted for exposure b enclosed buildings roof framing spaced 24 inches o c. Where the roof sheathing is less than 3 4 inch 19 1 mm thick the nails. If structural sheathing covers more than 25 percent of exterior structural sheathing shall be s upplemented with insulated sheathing of at least r 2. 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.

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. 2009 international residential code draft of new fire sprinkler related requirements prepared by the irc fire sprinkler coalition 10 9 08 this document contains the anticipated 2009 irc text based on final approval of code changes rb64 07 08 rb66 07 08 and rp3 07 08 using information published in icc s monographs. 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. It brings together all building plumbing mechanical fuel gas energy and electrical provisions for one and two family residences.

If structural sheathing covers 25 percent or less of the exte rior insulating sheathing is not required where structural sheathing is used. Many code requirements are not inspected.