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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 1,053 sections for San Antonio, TX, the 2024 IRC

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  • M2101.20.3

    Heat-Fusion Joints

    • Heat-fusion joints are socket, saddle or butt fused per ASTM D2657 on clean, dry surfaces, left undisturbed until cool, with ASTM D2683 or D3261 fittings.

    International Residential Code, 2024 · Chapter 21, Hydronic PipingRead the full text (opens UpCodes in a new tab)

  • M1601.1.2

    Underground Duct Systems

    • Underground ducts are concrete, clay, metal or plastic (150 F max for plastic), corrosion-protected or encased in 2 in of concrete, sloped to an accessible drain, and sealed and tested before burial.

    International Residential Code, 2024 · Chapter 16, Duct SystemsRead the full text (opens UpCodes in a new tab)

  • M1601.1.1

    Above-Ground Duct Systems

    • Above-ground ducts: discharge air 250 F max; factory ducts UL 181; fiberglass per SMACNA or NAIMA; metal and flex per SMACNA (or the thin-gauge table); materials flame spread 200 max; balancing dampers accessible.
    • Stud and joist cavities may be return plenums only: never supply, not in rated assemblies or exterior walls, one floor per stud cavity, fireblocked from other spaces, and sealed.

    International Residential Code, 2024 · Chapter 16, Duct SystemsRead 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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