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

  • R507.3.1

    Minimum Size

    • Deck footing size comes from the table by load, tributary area and soil; piers of brick or block need a 2 in footing projection all round.

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

  • R1001.5

    Firebox Walls

    • Firebox walls are solid or solid-grouted masonry, stone or concrete: 8 in total at back and sides with at least a 2 in firebrick lining (joints 1/4 in max), or 10 in with no lining.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead the full text (opens UpCodes in a new tab)

  • R402.1.2

    Wood Treatment

    • Wood foundation lumber and plywood is treated and kiln-dried per AWPA U1 and labelled; cuts are soaked with copper naphthenate of at least 2% copper.

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

  • R804.3.1

    Ceiling Joists

    • Steel ceiling joists are sized from the span tables by bracing, bear 1-1/2 in, are screwed to rafters per the heel table, and continuous joists need supports within 24 in of midspan; occupied attics follow the floor rules.
    • Steel ceiling joist bottoms are braced by gypsum or 1-1/2 in straps at 4 ft; tops by 33-mil members or straps per the tables, with blocking every 12 ft; splices only over bearings.

    International Residential Code, 2024 · Chapter 8, Roof-Ceiling ConstructionRead 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