In A Zones the lowest floor, basement included, is at least 1 ft above base flood or at the design flood level, whichever is higher.
In AO shallow-flood zones, the lowest floor is the mapped depth plus 1 ft above the highest adjacent grade, or 3 ft if no depth is mapped.
A detached garage or shed may sit below flood level if it's one story, 600 sq ft or less, storage or parking only, anchored, vented and flood-resistant.
Adhered stone veneer follows TMS 402/602 or the maker, sits 4 in above soil, 2 in above paving or 1/2 in above walks on the same foundation, over a 3-1/2 in screed reaching 1 in below the plate.
Wood shingles go on solid or 1x4 spaced sheathing at 3:12 or steeper, are No. 1-3 durable wood, side-lapped 1-1/2 in and gapped 1/4-3/8 in, with two stainless or hot-dip nails 3/4 in into the deck.
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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