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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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  • R322.1

    Dwelling Units or Sleeping Units

    • Buildings with four or more dwelling or sleeping units follow the IBC accessibility chapter for R-3; owner-occupied lodging with five or fewer guestrooms is exempt.

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

  • R603.2

    Structural Framing

    • Steel studs are coated structural sheet steel to AISI S240, sized per AISI S230 and labelled; screws follow the same rules as steel floors.

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

  • R302.10.1

    Insulation

    • Insulation, facings included, has a flame spread index of 25 or less and a smoke index of 450 or less.
    • Non-sprayed cellulose loose fill only needs the 450 smoke limit, tested to CAN/ULC S102.2.

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

  • R301.2.1.5.1

    Simplified Topographic Wind Speed-Up Method

    • The simplified speed-up table covers features up to 500 ft tall; on an escarpment the higher speed extends the greater of 1.5L or 6H downwind; a result of 140 mph or more means wind design is required.

    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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