Skip to content
Built4UIQ
Log inSign up free

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

Show another sample

  • R802.6

    Bearing

    • Rafters and ceiling joists bear 1-1/2 in on wood or metal and 3 in on masonry or concrete; on 3:12 or steeper roofs with a proper tie, bearing on the ridge board is enough.

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

  • R303.5.11

    Sill Plates and Headers

    • Spray foam at rim joists and sill plates may go uncovered if it's 3-1/4 in thick or less, 0.5 to 2.0 pcf, and rated for 25 flame spread and 450 smoke.

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

  • R502.2.2

    Blocking and Subflooring

    • Blocking and lumber subfloor are at least utility grade (subfloor may also be No. 4 boards or rated panels); fireblocking can be any grade.

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

  • 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)

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.

Check your plans against these codes

Start an application and get every flag with its section and fix.

Start an application