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• IBC 308.1

  Institutional Group I

  • Group I: care or supervision of people who can't save themselves without help, or people detained or whose liberty is restricted; Groups I-1 to I-4.

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• IBC 308.2

  Institutional Group I-1

  • I-1: more than 16 residents (not counting staff) living 24 hours in a supervised setting with custodial care, such as assisted living and group homes; Condition 1 or 2 and Section 420.

  Works withIBC 420

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• IBC 308.3

  Institutional Group I-2

  • I-2: 24-hour medical care for more than five people who can't save themselves, such as hospitals, nursing homes, psychiatric hospitals, detox and foster care facilities.

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• IBC 308.4

  Institutional Group I-3

  • I-3: more than five people held under restraint or security, such as jails, prisons and detention centers; Conditions 1 to 5 and Section 408.

  Works withIBC 408

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• IBC 308.5

  Institutional Group I-4, day care facilities

  • I-4: custodial care under 24 hours a day for more than five people of any age, by non-relatives, outside their home, such as adult and child day care.

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• IBC 308.2.1

  Condition 1

  • Condition 1: every resident can evacuate without help.

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• IBC 308.2.2

  Condition 2

  • Condition 2: some residents need limited verbal or physical help to evacuate.

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• IBC 308.2.3

  Six to 16 persons receiving custodial care

  • Custodial care for 6 to 16 residents is Group R-4.

  Works withIBC 310.5

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• IBC 308.2.4

  Five or fewer persons receiving custodial care

  • Custodial care for five or fewer: May be built as Group R-3 or under the IRC, if fully sprinklered per 903.3.1.3 or IRC P2904.

  Works withIBC 903.3.1.3IRC P2904

  International Building Code, 2024 · Chapter 3, Occupancy Classification and UseRead the full text (opens UpCodes in a new tab)

• IBC 308.3.1

  Occupancy conditions

  • I-2 buildings are Condition 1 or 2 and follow Section 407.

  Works withIBC 407

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• IBC 308.3.2

  Five or fewer persons receiving medical care

  • Medical care for five or fewer: May be built as Group R-3 or under the IRC, if fully sprinklered per 903.3.1.3 or IRC P2904.

  Works withIBC 903.3.1.3IRC P2904

  International Building Code, 2024 · Chapter 3, Occupancy Classification and UseRead the full text (opens UpCodes in a new tab)

• IBC 308.4.1

  Condition 1

  • Condition 1: free movement to the exterior; may be built as Group R.

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• IBC 308.4.2

  Condition 2

  • Condition 2: free movement between smoke compartments; exits to the exterior are locked.

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• IBC 308.4.3

  Condition 3

  • Condition 3: free movement within a smoke compartment; remote release to move to another.

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• IBC 308.4.4

  Condition 4

  • Condition 4: movement restricted; remote release from rooms to other smoke compartments.

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• IBC 308.4.5

  Condition 5

  • Condition 5: movement restricted; staff-controlled manual release to other smoke compartments.

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• IBC 308.5.1

  Classification as Group E

  • Child care for 6 to 100 children aged 2½ or under is Group E if every care room is on the level of exit discharge with its own exterior exit door.

  International Building Code, 2024 · Chapter 3, Occupancy Classification and UseRead the full text (opens UpCodes in a new tab)

• IBC 308.5.2

  Within a place of religious worship

  • Care during religious services is part of the main occupancy.

  International Building Code, 2024 · Chapter 3, Occupancy Classification and UseRead the full text (opens UpCodes in a new tab)

• IBC 308.5.3

  Five or fewer persons receiving care

  • Care for five or fewer is part of the main occupancy.

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• IBC 308.5.4

  Five or fewer persons receiving care in a dwelling unit

  • Care for five or fewer in a home is Group R-3 or may follow the IRC.

  Works withIRC

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• IBC 308.3.1.1

  Condition 1

  • Condition 1: nursing and medical care without emergency care, surgery, obstetrics or inpatient stabilization, such as nursing homes.

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• IBC 308.3.1.2

  Condition 2

  • Condition 2: nursing and medical care that may include emergency care, surgery, obstetrics or inpatient stabilization, such as hospitals.

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• IBC 202

  Conventional light-frame construction

  • Construction framed mainly with repetitive wood members, built to Section 2308.

  Works withIBC 2308

  International Building Code, 2024 · Chapter 2, DefinitionsRead the full text (opens UpCodes in a new tab)

• IBC 1603.1

  General

  • Construction documents show member sizes and locations and the design loads in 1603.1.1–1603.1.9; conventional light-frame (2308) lists loads, snow, wind, seismic, flood, soil and rain data.

  Works withIBC 2308IBC 1603.1.1IBC 1603.1.9IBC 1609.3.1IBC 1612.3

  International Building Code, 2024 · Chapter 16, Structural DesignRead the full text (opens UpCodes in a new tab)

• IBC 1613.1

  Scope

  • Earthquake design per ASCE 7; exempt: detached one- and two-family dwellings in SDC A–C, 2308 wood frame, ag storage.

  Works withIBC 1613IBC 2308IBC 3103.6.1.4IBC Chapter 14

  International Building Code, 2024 · Chapter 16, Structural DesignRead the full text (opens UpCodes in a new tab)

• IBC 1704.2

  Special inspections and tests

  • The owner (not the contractor) hires approved agencies for the special inspections in 1705, on top of building official inspections. Not required for minor work, accessory Group U, or conventional light-frame (2308) and prescriptive cold-formed steel construction.

  Works withIBC 1705.1IBC 110IBC 2308IBC 105IBC 1705IBC 312.1IBC 2206.1.2

  International Building Code, 2024 · Chapter 17, Special Inspections and TestsRead the full text (opens UpCodes in a new tab)

• IBC 2302.1

  General

  • Wood is designed by ASD (2306), LRFD (2307), conventional light-frame (2308), the AWC WFCM (2309), or ICC 400 for log structures.

  Works withIBC 2306.1IBC 2307.1IBC 2308.1IBC 2309.1IBC 2304IBC 2305IBC 2306IBC 2308IBC 2309IBC 2303

  International Building Code, 2024 · Chapter 23, WoodRead the full text (opens UpCodes in a new tab)

• IBC 2308.1

  General

  • Conventional light-frame construction for buildings within 2308.2 limits; detached one- and two-family homes and townhouses up to three stories use the IRC.

  Works withIBC 2308.2.1IBC 2308.2IRC

  International Building Code, 2024 · Chapter 23, WoodRead the full text (opens UpCodes in a new tab)

• IBC 1704.2.3

  Statement of special inspections

  • A statement of special inspections is submitted with the permit application, except for 2308 light-frame work.

  Works withIBC 107.1IBC 1704.3IBC 2206.1.2IBC 2308

  International Building Code, 2024 · Chapter 17, Special Inspections and TestsRead the full text (opens UpCodes in a new tab)

• IBC 2308.9.1

  Stud size, height and spacing

  • Stud size and spacing per Table 2308.9.1: 2×4 at 24 in for roof only, 16 in with one floor; 2×6 at 24 in with one floor, 16 in with two; 10 ft max height.

  Works withIRC R602.3IBC Table 2308.9.1

  International Building Code, 2024 · Chapter 23, WoodRead the full text (opens UpCodes in a new tab)

• IBC 2308.10.1

  Braced wall lines

  • Braced wall lines per Table 2308.10.1: max 35 ft apart (25 ft in SDC D–E), panels at each end and every 25 ft, minimum bracing percentage by SDC.

  Works withIRC R602.10IBC 2308.10.3IBC Table 2308.10.1

  International Building Code, 2024 · Chapter 23, WoodRead the full text (opens UpCodes in a new tab)

• IBC 2308.11.1

  Ceiling joist spans

  • Ceiling joist spans per Tables 2308.11.1(1)/(2).

  International Building Code, 2024 · Chapter 23, WoodRead the full text (opens UpCodes in a new tab)

• IBC 2308.11.2

  Rafter spans

  • Rafter spans per Tables 2308.11.2(1)–(6), adjusted per Table 2308.11.2(7) when ties sit high in the attic.

  International Building Code, 2024 · Chapter 23, WoodRead the full text (opens UpCodes in a new tab)

• IBC 2308.11.4

  Wind uplift

  • Rafters and trusses are tied down for uplift per Table 2308.11.4 (e.g. 120 mph, Exposure B, 32 ft span: 377 lb at 24 in o.c.).

  Works withIRC R802.11IBC 1609.3

  International Building Code, 2024 · Chapter 23, WoodRead the full text (opens UpCodes in a new tab)

• IBC 2308.8.1.1

  Allowable girder spans

  • Header and girder spans per Tables 2308.8.1.1(1)/(2) (e.g. 2-2×10 for roof and ceiling, 24 ft wide, 30 psf snow: 6 ft 10 in with 2 jack studs).

  International Building Code, 2024 · Chapter 23, WoodRead the full text (opens UpCodes in a new tab)

• IBC 2308.8.2.1

  Span

  • Floor joist spans per Tables 2308.8.2.1(1)/(2) (e.g. 2×10 Douglas fir #2 at 16 in, 40 psf live, 10 psf dead: 15 ft 5 in).

  International Building Code, 2024 · Chapter 23, WoodRead the full text (opens UpCodes in a new tab)

• IBC 2308.11.3.1

  Ceiling joist and rafter connections

  • Ceiling joists or rafter ties (4 ft max spacing) tie rafters across the building with heel nailing per Table 2308.11.3.1; otherwise the ridge needs a beam.

  Works withIRC R802.5IRC R802.5.2IBC 2308.3IBC 2308.4IBC 2308.10.7.2IBC Table 2308.11.3.1

  International Building Code, 2024 · Chapter 23, WoodRead 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.