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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 4,296 sections for San Antonio, TX, the 2024 IRC

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  • E3901.1

    General

    • 125 V, 15 and 20 A receptacle outlets are provided per E3901.2 to E3901.11, not counting ones in luminaires, appliances, cabinets, switched outlets or over 5.5 ft high; baseboard-heater receptacles may count (NEC 210.52).

    International Residential Code, 2024 · Chapter 39, Power and Lighting DistributionRead the full text (opens UpCodes in a new tab)

  • P3005.1.2

    Heel- or Side-Inlet Quarter Bends, Drainage

    • Heel-inlet quarter bends are fine except serving toilets, and low-heel inlets aren't wet vents; side-inlet bends work for drains and vents.

    International Residential Code, 2024 · Chapter 30, Sanitary DrainageRead the full text (opens UpCodes in a new tab)

  • R802.4.1

    Rafter Size

    • Rafter sizes come from the span tables by species, grade, size, spacing, snow or live load and whether a ceiling is attached; spans are measured horizontally.
    • When ceiling joists or rafter ties sit higher in the attic, rafter spans shrink: to 67% at a third of the rise, 76% at a quarter, up to full span at 1/7.5 or lower.

    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.

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