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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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  • R704.3

    Exterior Soffit Installation Where the Design Wind Pressure Exceeds 30 psf

    • Over 30 psf, soffits are rated for the wind; vinyl needs intermediate support over 12 in, and plywood soffit can follow the prescriptive nailing table up to 90 psf.

    International Residential Code, 2024 · Chapter 7, Wall CoveringRead the full text (opens UpCodes in a new tab)

  • R302.11.1

    Fireblocking Materials

    • Accepted fireblocks include 2 in lumber, doubled 1 in lumber, 23/32 in panels, 3/4 in particleboard, 1/2 in gypsum, 1/4 in cement millboard, secured batts or tested cellulose.

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

  • R606.6.4

    Lateral Support

    • Masonry walls are braced at intervals no more than 20 (solid bearing), 18 (other bearing and exterior nonbearing) or 36 (interior nonbearing) times their thickness.
    • Intersecting masonry walls interlock half the units with 3 in bearing, or tie with 9-gauge joint reinforcement at 8 in (16 in for interior nonbearing) running 30 in each way.
    • In SDC A-C, masonry walls tie to roofs and floors with straps or 1/2 in bolts at 6 ft, embedded 16 in or hooked to a bond beam 6 in below the top.

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

  • R507.3.1

    Minimum Size

    • Deck footing size comes from the table by load, tributary area and soil; piers of brick or block need a 2 in footing projection all round.

    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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