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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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  • R602.10.10

    Cripple Wall Bracing

    • Cripple walls are braced like the wall above, with 15% more length; in SDC D0/D1 and SDC C townhouses only panel methods, with panels no more than 14 ft apart.
    • Cripple walls 48 in or shorter can count as the first story; if any part is taller, the cripple wall is an extra story.

    International Residential Code, 2024 · Chapter 6, Wall ConstructionRead the full text (opens UpCodes in a new tab)

  • R403.1.3.3

    Slabs-on-Ground With Turned-Down Footings

    • In SDC D, monolithic turned-down slab edges get a No. 4 top and bottom, or a No. 5 or two No. 4s mid-depth; separate slabs get No. 3 hooked dowels at 4 ft or less.

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

  • R704.3

    Exterior Soffit Installation Where the Design Wind Pressure Exceeds 30 psf

    • Over 30 psf, soffits are rated for the wind; vinyl needs intermediate support over 12 in, and plywood soffit can follow the prescriptive nailing table up to 90 psf.

    International Residential Code, 2024 · Chapter 7, Wall CoveringRead the full text (opens UpCodes in a new tab)

  • R1001.2

    Footings and Foundations

    • Fireplace footings are concrete or solid masonry at least 12 in thick, extending 6 in past the fireplace or wall on every side, on undisturbed soil or engineered fill below frost depth.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead 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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