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Search the building code.

Every 2024 IRC section and the IBC as it loads, by number or topic, plus the local rules for your city. Free to search.

Detached houses, duplexes and townhouses up to 3 stories with their own exits use the IRC; every other building uses the IBC (IBC 101.2).

A random sample from 1,598 sections for San Antonio, TX, the 2024 IRC

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  • R1006.5

    Outlet

    • The air outlet is in the back or side of the firebox, or at hearth level within 24 in of the opening, closable and built so embers cannot fall into hidden combustible spaces.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead the full text (opens UpCodes in a new tab)

  • R404.1.4.2

    Concrete Foundation Walls

    • In SDC D, plain concrete walls are at most 8 ft tall with 4 ft of backfill and at least 7.5 in thick (6 in if 4 ft 6 in tall or less); walls the tables allow plain still get No. 4 bars at 48 in.

    International Residential Code, 2024 · Chapter 4, FoundationsRead the full text (opens UpCodes in a new tab)

  • R403.1

    General

    • Exterior walls sit on continuous concrete, solid or grouted masonry, crushed stone or wood footings bearing on undisturbed soil or engineered fill.
    • Concrete footing size comes from the tables by roof load, stories, foundation type, wall type and soil bearing value; widths may be interpolated between soil values but not extrapolated.
    • Add 2 in of width and 1 in of depth for every 4 ft the building is wider than 32 ft; narrower buildings may take the same off, down to 12 x 6 in.

    International Residential Code, 2024 · Chapter 4, FoundationsRead the full text (opens UpCodes in a new tab)

  • R804.3.6

    Roof Trusses

    • Steel roof trusses follow AISI S230 (braced per CFSBCSI) and are screwed to the wall track per Table R804.3.

    International Residential Code, 2024 · Chapter 8, Roof-Ceiling ConstructionRead the full text (opens UpCodes in a new tab)

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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