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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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  • R404.1.5.1

    Masonry Wall Thickness

    • Masonry foundation walls are at least as thick as the wall above; 8 in may carry brick-veneered frame or 10 in cavity walls up to 20 ft tall.

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

  • R602.10.3

    Required Length of Bracing

    • Required bracing length per line comes from the wind table (and the seismic table in SDC D or for SDC C townhouses), times the adjustment factors; only parallel panels count.
    • Wind bracing grows with exposure (C x1.2-1.4, D x1.5-1.7), taller roofs and walls and more wall lines; dropping interior gypsum adds 40%, and skipping horizontal blocking doubles it.

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

  • R602.10.9

    Braced Wall Panel Support

    • Cantilevered joists may carry braced panels; post or pier floors under them are engineered; short masonry stem walls of 48 in or less are reinforced per Figure R602.10.9.

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

  • R318.2

    Egress Door

    Used in checks
    • Each unit has a side-hinged egress door at least 32 in clear wide and 78 in high that opens from inside without a key.

    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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