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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)

  • R319.4.2

    Ladder and Steps

    • Area wells deeper than 44 in need a permanent ladder or steps that the open window doesn't block.

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

  • R703.11

    Vinyl Siding

    • Vinyl siding is labelled to ASTM D3679, starts on a starter strip, uses 0.120 in nails or 16-gauge staples reaching 1-1/4 in, at 16 in (horizontal) or 12 in (vertical).

    International Residential Code, 2024 · Chapter 7, Wall CoveringRead the full text (opens UpCodes in a new tab)

  • R1003.4.1

    Anchorage

    • Two 3/16 x 1 in straps embed 12 in into the chimney, hook the outer bars with a 6 in tail, and each fasten to at least four joists with two 1/2-in bolts.

    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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