Exterior wood walls follow this chapter or the AWC NDS, with sheathing nailed straight to framing and able to take the local wind pressure.
Studs run unbroken from the sole plate to a top plate braced by a floor, ceiling or roof; only jack, trimmer and cripple studs at openings are exempt.
Nail sizes and spacing for every framing and sheathing joint come from the fastening schedule; panels on supports 48 in or more apart get nails at 6 in.
Typical panel sheathing is nailed 6 in at edges and 12 in in the field; roof panels within 48 in of edges and ridges go to 4 in where wind exceeds 130 mph (B) or 110 mph (C).
Double top plate splices lap at least 24 in each side of the joint, with eight 16d common nails (or twelve smaller nails) per side.
Panel wall sheathing that resists wind is at least 3/8 in (24/0) on 16 in studs or 7/16 in (24/16) on 16 or 24 in studs, nailed 6 in edge and 12 in field, up to the listed wind speeds.
Particleboard wall sheathing (not exposed to weather) is 3/8 in M-1 or 1/2 in M-2 exterior glue on 16 in studs, gapped 1/16 in and nailed 3/8 in from edges.
Openings up to 18 ft 3 in work with 18 in of veneer each side, a 5x3-1/2x5/16 angle shored 7 days, joint reinforcement 12 in past each side, and enough veneer above.
The air intake draws from outdoors or a naturally vented crawl or attic, not from the garage or basement, sits no higher than the firebox (unless listed), and has a 1/4 in corrosion-resistant screen.
Searches all 4,276 IRC 2024 sections, 5,532 IBC 2024 sections and defined terms (Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 so far) and each city's local rules as they are added. Section numbers and titles from the International Residential Code and International Building Code, 2024 editions, copyrighted by the International Code Council; the IRC's electrical chapters (34 to 43) follow NFPA 70, the National Electrical Code. Requirements are summarized in our words (IRC Chapters 3 to 43, IBC Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33); read the full text at the link on each result. Local values come from each city's published documents.
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