Skip to content
Built4UIQ
Log inSign up free

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).

37 sections matching “IBC 404” for San Antonio, TX, the 2024 IRC

  • IBC 404.1

    General

    • Atrium rules apply; atriums aren't allowed in Group H. Openings meeting 712.1 exceptions are excepted.

    Works withIBC 712.1

    International Building Code, 2024 · Chapter 4, Special Detailed Requirements Based on Occupancy and UseRead the full text (opens UpCodes in a new tab)

  • IBC 404.2

    Use

    • The atrium floor is limited to low fire hazard uses unless that space is sprinklered.

    Works withIFC

    International Building Code, 2024 · Chapter 4, Special Detailed Requirements Based on Occupancy and UseRead the full text (opens UpCodes in a new tab)

  • IBC 404.3

    Automatic sprinkler protection

    • The whole building is sprinklered; areas separated by 2 hours and atrium ceilings over 55 ft are excepted.

    International Building Code, 2024 · Chapter 4, Special Detailed Requirements Based on Occupancy and UseRead the full text (opens UpCodes in a new tab)

  • IBC 404.5

    Smoke control

    • Atriums need smoke control, except two-story atriums (other than I-2 and I-1 Condition 2) and where only the lowest two stories open.

    Works withIBC 909IBC 713.4

    International Building Code, 2024 · Chapter 4, Special Detailed Requirements Based on Occupancy and UseRead the full text (opens UpCodes in a new tab)

  • IBC 404.6

    Enclosure of atriums

    • Atriums are separated by 1-hour construction, or sprinklered glass, ¾-hour glass block, or spaces included in the smoke control design.

    Works withIBC 707IBC 711IBC 2110

    International Building Code, 2024 · Chapter 4, Special Detailed Requirements Based on Occupancy and UseRead the full text (opens UpCodes in a new tab)

  • IBC 404.8

    Interior finish

    • Atrium wall and ceiling finish at least Class B, with no sprinkler reduction.

    International Building Code, 2024 · Chapter 4, Special Detailed Requirements Based on Occupancy and UseRead the full text (opens UpCodes in a new tab)

  • IBC 720.6

    Cellulosic fiber loose-fill insulation and self-supported spray-applied cellulosic insulation

    • Cellulose meets CPSC 16 CFR 1209 and 1404 with labeled packages.

    International Building Code, 2024 · Chapter 7, Fire and Smoke Protection FeaturesRead the full text (opens UpCodes in a new tab)

  • IBC 1402.6

    Water-resistive barriers

    • Type I–IV walls over 40 ft above grade plane with a combustible WRB must pass NFPA 285. Exempt if the WRB is the only combustible part and the covering is brick, concrete, stone, terra cotta, stucco or steel per Table 1404.2, or the WRB meets low heat-release limits (ASTM E1354) and flame spread ≤25 / smoke ≤450.

    Works withIBC 703.3IBC Table 1404.2IBC 1402.8

    International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

  • IBC 1404.2

    Weather protection

    • Coverings at the minimum thicknesses in Table 1404.2 are accepted weather coverings.
    • Minimum thickness (in): adhered masonry veneer 0.25; aluminum siding 0.019; anchored stone 2.0, cast stone 2.5; fiber-cement lap/panel 0.25; fiberboard 0.5; hardboard 0.25; exterior plywood with sheathing 0.313; porcelain tile 0.125; steel 0.0149; structural glass 0.344; three-coat stucco 0.875 over metal lath, 0.625 over masonry/concrete; two-coat stucco 0.5 masonry, 0.375 concrete; vinyl 0.035; wood shingles 0.375; wood siding without sheathing 0.5.

    Works withIBC 2304.6

    International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

  • IBC 1404.3

    Vapor retarders

    • Frame walls get an interior vapor retarder per Tables 1404.3(1)–(4) or a hygrothermal design; climate zone from IECC Chapter 3. Not needed in zones 1–3, basements, below grade, or in zones 4–8 where Table 1404.3(5) exterior insulation is used.
    • Class I ≤0.1 perm (polyethylene, foil); Class II >0.1–1.0 perm (kraft-faced batts, vapor retarder paint); Class III >1.0–10 perm (latex or enamel paint).
    • Zones 1–2: Class III only. Zone 3: II or III. Zone 4 (not marine): II, or III per Table 1404.3(3). Marine 4 and 5–8: I, II, or III per Table 1404.3(3). A responsive retarder is allowed anywhere.
    • Class III allowed with vented cladding over WSP/fiberboard/gypsum (zone 4–5; fiberboard/gypsum only in 6), or continuous insulation over 2×4 / 2×6: zone 4 R-2.5/R-3.75, 5 R-5/R-7.5, 6 R-7.5/R-11.25, 7 R-10/R-15, 8 R-12.5/R-20.
    • Zone 3 R-2; zones 4–6 R-3 (2×4) / R-5 (2×6); 7 R-5 / R-7.5; 8 R-7.5 / R-10.
    • Exterior continuous insulation of at least R-4.5 (zone 4), 6.5 (5), 8.5 (6), 11.5 (7), 14 (8), with ≤R-5 inboard and a ≤1 perm layer on the outside of the wall.

    Works withIECC

    International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

  • IBC 1404.3.1

    Spray foam plastic insulation for moisture control with Class II and III vapor retarders

    • Interior spray foam ≤1.5 perm on sheathing counts toward the continuous-insulation R-value in Tables 1404.3(3) and (4).

    International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

  • IBC 1404.5.2

    Cladding attachment over foam sheathing to cold-formed steel framing

    • Attachments through foam to steel studs meet Tables 1404.5.2.1/1404.5.2.2 or an approved design.

    International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

  • IBC 1404.5.3

    Cladding attachment over foam sheathing to wood framing

    • Attachments through foam to wood framing meet Tables 1404.5.3.1/1404.5.3.2 or an approved design.

    International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

  • IBC 1404.15.2

    Installation over foam plastic insulating sheathing

    • Over foam alone, siding needs a wind rating per Table 1404.15.2 (e.g. 115 mph Exposure B with interior gypsum: −35.5 psf). Exempt over structural backing, with a maker's rating, or where the foam is designed for the load.

    Works withIBC 2603.10

    International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

  • IBC 1404.5.2.1

    Direct attachment

    • Direct cladding screws through foam into steel per Table 1404.5.2.1. Example: #10 screw into 43 mil steel at 16 in o.c., 8 in vertical spacing, 11 psf cladding allows 4.00 in foam.

    International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

  • IBC 1404.5.3.1

    Direct attachment

    • Direct nails through foam into wood (1¼ in penetration) per Table 1404.5.3.1. Example: 0.131 in nail at 16 in o.c., 6 in vertical spacing, 11 psf allows 2.15 in foam.

    International Building Code, 2024 · Chapter 14, Exterior WallsRead 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.

Check your plans against these codes

Start an application and get every flag with its section and fix.

Start an application