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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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  • R330.8.1

    Garages

    • Batteries in a garage's driving path need impact protection: the door-wide zone up to 48 in high, plus 36 in either side on the back wall and the side walls near it.

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

  • R804.3.1

    Ceiling Joists

    • Steel ceiling joists are sized from the span tables by bracing, bear 1-1/2 in, are screwed to rafters per the heel table, and continuous joists need supports within 24 in of midspan; occupied attics follow the floor rules.
    • Steel ceiling joist bottoms are braced by gypsum or 1-1/2 in straps at 4 ft; tops by 33-mil members or straps per the tables, with blocking every 12 ft; splices only over bearings.

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

  • R602.9

    Cripple Walls

    • Cripple walls use studs at least as big as those above (one story bigger if over 4 ft), sit on continuous foundations, and under 14 in are sheathed or solid-blocked.

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

  • R403.3.1

    Foundations Adjoining Frost-Protected Shallow Foundations

    • Foundations next to a frost-protected shallow foundation still need their own frost protection.

    International Residential Code, 2024 · Chapter 4, FoundationsRead 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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