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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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  • R608.7

    Solid Walls for Resistance to Lateral Forces

    • Each exterior concrete wall line has enough solid full-height wall for wind (from tables, with reduction factors), in segments of 24 in or more, openings no wider than 18 ft, and a segment within 6 ft of each corner.

    International Residential Code, 2024 · Chapter 6, Wall ConstructionRead the full text (opens UpCodes in a new tab)

  • R505.3.3.3

    Blocking at Interior Bearing Supports

    • Single continuous steel joists over a support get blocking at every other joist, 33 mil, 2 in shallower than the joist; back-to-back joists don't.

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

  • R803.1

    Lumber Sheathing

    • Lumber roof sheathing is at least 5/8 in at 24 in spacing; 1-1/2 in tongue-and-groove spans 48 to 72 in with stronger lumber; no spaced sheathing in SDC D2.

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

  • R1002.5

    Masonry Heater Clearance

    • Combustibles stay 36 in from a masonry heater, with the space vented; with 8 in walls and 5 in channel walls the clearance drops to 4 in and 8 in to a combustible ceiling; listed heaters follow their listing.

    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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