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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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  • R1001.5.1

    Steel Fireplace Units

    • A steel fireplace unit may be built into masonry per its listing or this section: 1/4-in steel firebox, air-circulating chamber ducted indoors, 8 in total encasement of which 4 in is solid masonry or concrete, metal or masonry ducts.

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

  • R318.7.11.2

    Bulkhead Enclosure Stairways

    • Bulkhead basement stairs that aren't required egress are exempt if the drop is 8 ft or less and the opening has a bulkhead cover.

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

  • R802.7

    Cutting, Drilling and Notching

    • Roof member notches and holes follow the floor joist rules; rafter tails may be notched if 3-1/2 in remains and the overhang is 24 in or less; ceiling joist taper cuts are a quarter of the depth at most.

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

  • R303.5.7

    Foam Backer Board

    • Siding backer foam up to 1/2 in thick with low potential heat needs no barrier if it's behind 2 in of mineral fiber, over existing siding, or tested.

    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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