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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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  • R401.1

    Application

    • This chapter governs foundations and foundation spaces; flood-zone foundations also follow R306, and wood foundations follow AWC PWF.
    • Prescriptive wood foundations are limited to two floors and a roof, with interior walls at most 50 ft apart; in SDC D they must be engineered.

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

  • R404.2.2

    Stud Size

    • Wood foundation studs are 2x6, with an Fb of at least 1,250 psi at 16 in or 875 psi at 12 in, and lumber carries an accredited grade mark.

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

  • R301.2.1.1

    Wind Limitations and Wind Design Required

    • Prescriptive wind rules stop applying where the map requires wind design, or at 140 mph or more in a special wind region; the house is then designed to WFCM, ICC 600, ASCE 7, AISI S230 or the IBC.

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

  • R318.7.12.1

    Treads of Alternating Tread Devices

    • Alternating tread devices have treads at least 5 in deep (8-1/2 in projected) and 7 in wide, risers up to 9-1/2 in, at 50 to 70 degrees.

    International Residential Code, 2024 · Chapter 3, Building PlanningRead 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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