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

  • R403.1

    General

    • Exterior walls sit on continuous concrete, solid or grouted masonry, crushed stone or wood footings bearing on undisturbed soil or engineered fill.
    • Concrete footing size comes from the tables by roof load, stories, foundation type, wall type and soil bearing value; widths may be interpolated between soil values but not extrapolated.
    • Add 2 in of width and 1 in of depth for every 4 ft the building is wider than 32 ft; narrower buildings may take the same off, down to 12 x 6 in.

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

  • R502.1.2

    Prefabricated Wood I-Joists

    • Engineered floor products follow their own standards: I-joists ASTM D5055, glulam ANSI A190.1/117 and ASTM D3737, SCL ASTM D5456, CLT PRG 320, logs ICC 400, rim board PRR 410 or ASTM D7672.

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

  • R402.2

    Concrete

    • Concrete strength depends on where it goes and how harsh the weathering is; exposed flatwork and walls in moderate or severe zones are air-entrained.

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

  • R403.1.8.1

    Expansive Soils Classifications

    • Soil is expansive if its PI is 15 or more and over 10% passes a No. 200 sieve and over 10% is finer than 5 microns, or if its expansion index exceeds 20.

    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