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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 6,919 sections for San Antonio, TX, the 2024 IRC and IBC

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  • IBC 1808.8.1

    Concrete or grout strength and mix proportioning

    • Minimum f'c: 2,500 psi in SDC A–C and for light-frame R/U of two stories in SDC D–F; 3,000 psi for other SDC D–F; 4,000 psi precast piles, socketed shafts and micropiles; 5,000 psi prestressed piles.

    Works withIBC Table 1808.8.1

    International Building Code, 2024 · Chapter 18, Soils and FoundationsRead the full text (opens UpCodes in a new tab)

  • R404.1.2.1

    Masonry Foundation Walls

    • Masonry foundation walls are sized from the plain or reinforced tables by wall height, backfill height and soil class; rubble stone isn't allowed in SDC D or for townhouses in C.
    • Unbalanced backfill is measured from outside grade down to the footing top or inside grade, or to the top of an interior slab bearing against the wall.

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

  • IBC 508.4

    Separated occupancies

    • Buildings meeting this section are separated occupancies, divided per Table 508.4.
    • Sprinklered building examples: R to A, E, B, M, S-1, S-2 or U is 1 hour; A/E to B, M, S-1 1 hour; A/E to S-2/U none; B/F-1/M/S-1 to each other none; I-2 to most groups 2 hours; H-2 3 hours from A, B, R. Unsprinklered values are one hour higher or not permitted. Separations from areas used only for private vehicles drop 1 hour (not below 1).

    Works withIBC Table 508.4IBC 420IBC 406.3.2

    International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead 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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