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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

    Wind Design Criteria

    • Wind design uses the mapped ultimate wind speed, but never less than the lowest speed the prescriptive tables cover.
    • Component and cladding design pressures are never taken below 10 psf, positive or negative.
    • A member's effective wind area is span times a width of at least a third of the span; for a fastener, no more than its tributary area.
    • The edge and corner pressure zones are 4 ft wide on every building, and an overhang adds its roof zone and adjacent wall zone pressures together.
    • Multiply the base cladding pressures by this factor for mean roof height and exposure.

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

  • R804.3.7

    Ceiling and Roof Diaphragms

    • Steel-framed gable ends need a ceiling diaphragm of 1/2 in gypsum (length per table) or 3/8 in panels (12 ft, or 14 ft for buildings 36 ft and wider); roofs get 3/8 in panels, blocked if 3:1 plan and 9:12 or steeper.

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

  • R507.5.1

    Deck Beam Bearing

    • Deck beam plies are continuous between bearings, cantilever no more than a quarter of the span, and bear 1-1/2 in on wood or 3 in on concrete.

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

  • R1001.2.1

    Ash Dump Cleanout

    • An ash-dump cleanout below the firebox, where provided, has a ferrous metal or masonry door and frame that stays shut, placed so emptying it cannot endanger combustibles.

    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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