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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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  • R401.1

    Application

    • This chapter governs foundations and foundation spaces; flood-zone foundations also follow R306, and wood foundations follow AWC PWF.
    • Prescriptive wood foundations are limited to two floors and a roof, with interior walls at most 50 ft apart; in SDC D they must be engineered.

    International Residential Code, 2024 · Chapter 4, FoundationsRead the full text (opens UpCodes in a new tab)

  • R301.2.1.2

    Protection of Openings

    • In windborne debris regions, exterior glazing needs large-missile impact protection; garage door glazing uses an approved impact standard or ANSI/DASMA 115.
    • Precut wood structural panels can serve as opening protection if they are at least 7/16 in thick and span 8 ft or less, with anchors installed permanently.
    • Max anchor spacing for debris-protection panels depends on anchor type and panel span; anchors embed at least 2 in.

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

  • R608.1

    General

    • Exterior concrete walls follow this section, PCA 100, ACI 318 or ACI 332, with light-frame interiors; drawings needn't be sealed unless state law says so.

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

  • R503.3

    Particleboard

    • Particleboard is graded to ANSI A208.1; underlayment is Type PBU at least 1/4 in, installed per the maker and nailed per Table R602.3(1).

    International Residential Code, 2024 · Chapter 5, FloorsRead 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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