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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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  • R507.9.1.1

    Ledger Details

    • Deck ledgers are at least 2x8 treated Southern pine, incised treated hem-fir or durable wood, never carry beam point loads, and never hang on stone or brick veneer.

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

  • R1003.3

    Seismic Reinforcing

    • Chimneys in SDC D0 to D2 are reinforced and anchored per R1003.3.1, R1003.3.2 and R1003.4; in SDC A, B or C neither is required.

    Local review: San Antonio is typically SDC A or B, so chimney reinforcing and seismic anchorage are normally not required; confirm for the site.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead the full text (opens UpCodes in a new tab)

  • R610.8

    Headers

    • SIP headers are at least 11-7/8 in deep, unspliced, and span only 2 to 4 ft (longer headers follow R602.7 or panel box headers).

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

  • R703.8.2.2

    Support by Ledger or Roof Construction

    • An angle on a ledger or roof needs at least three 2x6 (or 550S162) members, the first lagged with three 5/8 x 5 in lags per stud.

    International Residential Code, 2024 · Chapter 7, Wall CoveringRead 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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