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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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  • R505.1.1

    Applicability Limits

    • Prescriptive steel floors cover buildings up to 60 ft long and 40 ft wide, three stories, under 140 mph in Exposure B or C, and 70 psf snow or less.

    International Residential Code, 2024 · Chapter 5, FloorsRead the full text (opens UpCodes in a new tab)

  • R318.7.5.1

    Risers

    • Risers are 7-3/4 in or less, vary no more than 3/8 in within a flight, and slope no more than 30 degrees.
    • Open risers more than 30 in above the floor below can't pass a 4 in ball.

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

  • R406.1

    Concrete and Masonry Foundation Dampproofing

    • Below-grade concrete and masonry walls are dampproofed from grade down to the footing top or 6 in below the floor; masonry is first parged with 3/8 in of cement.

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

  • R325.1.1

    Natural Light

    • Habitable rooms have glazing equal to at least 8% of their floor area, facing a street, yard or court.
    • Glazing may face a roofed porch that's at least 65% open on its long side with a 7 ft ceiling, or a sunroom; or artificial light averaging 6 footcandles at 30 in can replace it.

    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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