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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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  • R403.1.4.1

    Frost Protection

    • Foundations are protected from frost by going below the local frost line, a frost-protected shallow foundation, ASCE 32, or bearing on rock; never on seasonally frozen soil.
    • Frost protection isn't needed for detached light-frame sheds up to 600 sq ft, or other sheds up to 400 sq ft, with eaves of 10 ft or less.

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

  • R319.7

    Alterations or Repairs of Existing Basements

    • A new bedroom in an existing basement needs an escape opening; other basement alterations don't trigger one.

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

  • R802.4.6

    Collar Ties

    • Collar ties sit in the upper third of the attic, are at least 1x4 at 4 ft; a 1-1/4 in 20-gauge ridge strap with three 10d nails each side may replace them.

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

  • R1003.3

    Seismic Reinforcing

    • Chimneys in SDC D0 to D2 are reinforced and anchored per R1003.3.1, R1003.3.2 and R1003.4; in SDC A, B or C neither is required.

    Local review: San Antonio is typically SDC A or B, so chimney reinforcing and seismic anchorage are normally not required; confirm for the site.

    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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