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• R804.3.7

  Ceiling and Roof Diaphragms

  • Steel-framed gable ends need a ceiling diaphragm of 1/2 in gypsum (length per table) or 3/8 in panels (12 ft, or 14 ft for buildings 36 ft and wider); roofs get 3/8 in panels, blocked if 3:1 plan and 9:12 or steeper.

  International Residential Code, 2024 · Chapter 8, Roof-Ceiling ConstructionRead the full text (opens UpCodes in a new tab)

• R606.12.1

  General

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

• R404.1.9.5

  Masonry Piers in Flood Hazard Areas

  International Residential Code, 2024 · Chapter 4, FoundationsRead the full text (opens UpCodes in a new tab)

• R306.3.5

  Walls Below Required Elevation

  • Walls below a coastal building are non-structural and either screen, lattice or breakaway at 10 to 20 psf; stronger walls need a sealed design.

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

• R306

  Flood-Resistant Construction

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

• R306.2

  Flood Hazard Areas (Including A Zones)

  • Areas with 1.5 to 3 ft waves are Coastal A Zones and follow the coastal rules.

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

• R1001.5

  Firebox Walls

  • Firebox walls are solid or solid-grouted masonry, stone or concrete: 8 in total at back and sides with at least a 2 in firebrick lining (joints 1/4 in max), or 10 in with no lining.

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

• R310.2.2

  Alterations, Repairs and Additions

  International Residential Code, 2024 · Chapter 3, Building PlanningRead 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.