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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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  • R603.7

    Jack and King Studs

    • Steel openings get 1 to 4 jack and king studs per side by opening width and stud spacing, matching the wall studs.

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

  • R1001.11

    Fireplace Clearance

    • Framing and other combustibles stay 2 in from the front and sides and 4 in from the back of a masonry fireplace; the gap is left open except for noncombustible fill or fireblocking.
    • Clearance exceptions: UL 127 zero-clearance listed masonry fireplaces; 12 in from the firebox lining when built into a masonry wall; trim and sheathing edges may abut sidewalls 8 in (12 in for openings of 6 sq ft or more) from the lining.
    • Combustible mantels and trim stay at least 6 in from the opening, and within 12 in of it may project no more than 1/8 in per inch of distance.

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

  • R608.5.5

    Construction Joints in Walls

    • Construction joints in concrete walls follow the foundation-wall rule: at supports with No. 4 bars at 24 in across them (plain walls), or mid-span in reinforced walls.

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

  • R1005.3

    Solid-Fuel Appliances

    • In dwellings, factory-built chimneys for solid-fuel appliances meet UL 103 Type HT and carry its markings; chimneys for open fireplaces need UL 103 without the HT rating.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead 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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