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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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  • R1001.3

    Seismic Reinforcing

    • In Seismic Design Category D0 to D2, masonry or concrete chimneys are reinforced per Table R1001.1 and Section R606.

    Local review: San Antonio sites are normally Seismic Design Category A or B, so chimney reinforcing and anchorage are usually not required; confirm the SDC for the site in Table R301.2.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead the full text (opens UpCodes in a new tab)

  • R1001.5

    Firebox Walls

    • Firebox walls are solid or solid-grouted masonry, stone or concrete: 8 in total at back and sides with at least a 2 in firebrick lining (joints 1/4 in max), or 10 in with no lining.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead the full text (opens UpCodes in a new tab)

  • R804.2

    Structural Framing

    • Steel roof members follow AISI S240/S230 for material, coating, size and labelling, in line with the framing below, with the same screw rules as steel floors and walls.

    International Residential Code, 2024 · Chapter 8, Roof-Ceiling ConstructionRead 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)

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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