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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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  • R1003.13

    Multiple Flues

    • Multiple flues in one chimney are separated by masonry wythes at least 4 in thick bonded into the walls; two flues serving one appliance may touch if their joints are staggered 4 in.

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

  • R505.3.2

    Minimum Floor Joist Sizes

    • Steel joist size comes from the span table; continuous joists have interior supports within 2 ft of midspan, and joists bear 1-1/2 in on exterior and 3-1/2 in on interior walls.

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

  • R324.4.5

    Glazing and Wet Surfaces

    • Glass at tubs, showers, spas, saunas and pools is hazardous if its bottom is under 60 in above the standing surface, unless it's more than 60 in away from the water.

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

  • R801.3

    Roof Drainage

    • On expansive or collapsible soils, homes need gutters or another controlled roof drain that discharges at least 5 ft from the foundation or into an approved system.

    Local review: San Antonio's expansive clays make this apply to most homes: plan gutters and downspouts that discharge 5 ft or more from the foundation.

    International Residential Code, 2024 · Chapter 8, Roof-Ceiling 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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