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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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  • R310.7

    Fire Alarm Systems

    • A household fire alarm system may replace smoke alarms if it uses UL 268 detectors in the same locations and stays with the home.

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

  • R908.3

    Roof Replacement

    • A roof replacement strips to the deck, except sound adhered ice barrier or self-adhered underlayment may stay and be covered (no more than two layers).

    International Residential Code, 2024 · Chapter 9, Roof AssembliesRead the full text (opens UpCodes in a new tab)

  • R301.2.1.1

    Wind Limitations and Wind Design Required

    • Prescriptive wind rules stop applying where the map requires wind design, or at 140 mph or more in a special wind region; the house is then designed to WFCM, ICC 600, ASCE 7, AISI S230 or the IBC.

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

  • R602.10.3

    Required Length of Bracing

    • Required bracing length per line comes from the wind table (and the seismic table in SDC D or for SDC C townhouses), times the adjustment factors; only parallel panels count.
    • Wind bracing grows with exposure (C x1.2-1.4, D x1.5-1.7), taller roofs and walls and more wall lines; dropping interior gypsum adds 40%, and skipping horizontal blocking doubles it.

    International Residential Code, 2024 · Chapter 6, Wall 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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