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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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  • R507.10

    Exterior Guards

    • Deck guards meet R301.5 and R321 and carry their loads continuously into the joists; side-mounted guards brace the rim against rolling, with no end-grain-only fasteners.

    International Residential Code, 2024 · Chapter 5, FloorsRead the full text (opens UpCodes in a new tab)

  • R802.5.2

    Ceiling Joist and Rafter Connections

    • Ceiling joists in the bottom third of the rafter height are nailed to the rafters per the heel joint table; higher joists, or joists running the other way without rafter ties, require a beam ridge.
    • Heel nailing rises as ties move up: x1.11 at 1/10 of the rise or less, up to x1.5 at one-third; above a third, the connection is designed.

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

  • R301.2.2.1.2

    Alternative Determination of Seismic Design Category E

    • A mapped SDC E site may be built as D2 if an IBC study shows D, or if the bracing lines stack, floors don't cantilever and the building is regular.

    International Residential Code, 2024 · Chapter 3, Building PlanningRead the full text (opens UpCodes in a new tab)

  • R610.4

    SIP Wall Panels

    • SIP thickness (4.5 or 6.5 in, or design required) comes from the tables by width, wind, snow and wall height; panels carry a grade mark.

    International Residential Code, 2024 · Chapter 6, Wall 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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