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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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  • R804.3

    Roof Construction

    • Steel roofs use both ceiling joists and rafters: sheathing screwed 6 in edge and 12 in field, gypsum 12 in, gable truss to track at 12 in, and 3 to 10 No. 10 screws per joist at the wall by wind and span.

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

  • 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)

  • R507.9.1.3

    Ledger to Band Joist Details

    • Ledger lag screws and bolts are 1/2 in, spaced per the table by joist span and load, with lag holes drilled 1/2 in through the ledger and 5/16 to 3/8 in into the band.
    • Ledger fasteners stay 2 in from the ledger top and ends and 3/4 in from its bottom, staggered, with rows 1-5/8 to 5 in apart; in the band, 3/4 in from top and 2 in from bottom.

    International Residential Code, 2024 · Chapter 5, FloorsRead the full text (opens UpCodes in a new tab)

  • R507.2.2

    Plastic Composite Deck Boards, Stair Treads, Guards or Handrails

    • Composite deck boards, treads, guards and rails meet ASTM D7032, are labelled with load and span, and have a flame spread of 200 or less.

    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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