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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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  • R602.10.1.4

    Angled Walls

    • A wall along a braced line may angle off for up to 8 ft of diagonal; longer, it becomes its own braced wall line.

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

  • R602.9

    Cripple Walls

    • Cripple walls use studs at least as big as those above (one story bigger if over 4 ft), sit on continuous foundations, and under 14 in are sheathed or solid-blocked.

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

  • R804.3.5

    Framing of Openings in Roofs and Ceilings

    • Steel roof openings have headers 4 ft or shorter, matching the adjacent members, joined to trimmers with four 2x2 clips and four No. 8 screws per leg.

    International Residential Code, 2024 · Chapter 8, Roof-Ceiling ConstructionRead the full text (opens UpCodes in a new tab)

  • R602.3.1

    Stud Size, Height and Spacing

    • Bearing studs up to 10 ft tall: 2x4 at 24 in under a roof only, 16 in with one floor; 2x6 at 24 in with one floor, 16 in with two. Nonbearing 2x4 studs reach 14 ft.
    • Utility-grade studs are spaced 16 in or less, carry only a roof, and are no taller than 8 ft in bearing walls or 10 ft in interior partitions.
    • Tall 2x6 No. 2 studs under a roof with 6 ft or less of tributary length can reach 18 ft at 16 in or 20 ft at 12 in where snow is 25 psf or less and wind 130 mph or less.
    • The alternate stud table allows exterior bearing studs up to 12 ft in Exposure B with roof live load 20 psf or less and snow 30 psf or less.

    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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