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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 1,054 sections for San Antonio, TX, the 2024 IRC and IBC

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  • 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)

  • M1413.1

    General

    • Evaporative coolers are listed to UL 1995 or UL/CSA 60335-2-40, set level per M1305.1.3.1, flashed at wall openings, protect potable water, and site intakes per R325.5.1.

    International Residential Code, 2024 · Chapter 14, Heating and Cooling Equipment and AppliancesRead the full text (opens UpCodes in a new tab)

  • M2101.1

    General

    • Hydronic pipe and fittings come from Table M2101.1, are rated for the system's temperature and pressure, and are installed per the maker; some plastics are limited to lower temperatures.

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

  • M1411.4

    Field-Installed Accessories

    • Field accessories follow both makers' instructions; in A2L system ductwork they may not have electric heat, flames or switches over 2.5 kVA.

    International Residential Code, 2024 · Chapter 14, Heating and Cooling Equipment and AppliancesRead 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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