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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 9,828 sections for San Antonio, TX, the 2024 IRC and IBC

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  • IBC 3313.2

    Combustible building materials

    • Combustible materials on site need 500 gpm from a hydrant within 500 ft.

    International Building Code, 2024 · Chapter 33, Safeguards During ConstructionRead the full text (opens UpCodes in a new tab)

  • R602.3

    Design and Construction

    • Exterior wood walls follow this chapter or the AWC NDS, with sheathing nailed straight to framing and able to take the local wind pressure.
    • Studs run unbroken from the sole plate to a top plate braced by a floor, ceiling or roof; only jack, trimmer and cripple studs at openings are exempt.
    • Nail sizes and spacing for every framing and sheathing joint come from the fastening schedule; panels on supports 48 in or more apart get nails at 6 in.
    • Typical panel sheathing is nailed 6 in at edges and 12 in in the field; roof panels within 48 in of edges and ridges go to 4 in where wind exceeds 130 mph (B) or 110 mph (C).
    • Double top plate splices lap at least 24 in each side of the joint, with eight 16d common nails (or twelve smaller nails) per side.
    • Panel wall sheathing that resists wind is at least 3/8 in (24/0) on 16 in studs or 7/16 in (24/16) on 16 or 24 in studs, nailed 6 in edge and 12 in field, up to the listed wind speeds.
    • Particleboard wall sheathing (not exposed to weather) is 3/8 in M-1 or 1/2 in M-2 exterior glue on 16 in studs, gapped 1/16 in and nailed 3/8 in from edges.

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

  • P3005.1.6

    Drainage Piping Size Reduction in the Direction of Flow

    • Drains never shrink downstream, except a 4 x 3 closet flange, a 4-into-3 closet bend with the 4 in leg up, or an offset closet flange.

    International Residential Code, 2024 · Chapter 30, Sanitary DrainageRead 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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