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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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  • R301.2.1.4

    Exposure Category

    • Exposure B is the default; use C for open terrain that extends more than 1,500 ft, or when the site borders more than 600 ft of open terrain.
    • Exposure D applies facing at least 5,000 ft of open water or flats, and reaches inland the greater of 600 ft or 20 times the building height.
    • In a subdivision, exposure is judged as if neighbouring homes starting within a year are already built.

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

  • R602.6.1

    Drilling and Notching of Top Plate

    • Cutting a bearing wall's top plate more than halfway for pipes or ducts needs a 16-gauge, 1-1/2 in steel tie with eight 10d nails each side, running 6 in past the cut.

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

  • R330.8.1

    Garages

    • Batteries in a garage's driving path need impact protection: the door-wide zone up to 48 in high, plus 36 in either side on the back wall and the side walls near it.

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

  • R1003.3.1

    Vertical Reinforcing

    • Chimneys up to 40 in wide get four continuous No. 4 bars anchored in the foundation and grouted per R608.1.1, not bonded to the liner; add two bars per extra 40 in of width or part of it.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead 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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