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• R507.7

  Decking

  • Joist spacing for 5/4 wood decking is 12 in (single span) or 16 in (multiple), 2 in decking 24 in; diagonal boards closer; each board gets two nails or screws per joist.

  International Residential Code, 2024 · Chapter 5, FloorsRead the full text (opens UpCodes in a new tab)

• R804.3.2.2

  Roof Rafter Support Brace

  • A rafter support brace is a 350S162-33 or larger, 8 ft or shorter, at 45 degrees or steeper, with four No. 10 screws each end, within 6 in of the bearing wall, and mid-braced if over 4 ft.

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

• R302.9.1

  Flame Spread Index

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

• R905.8.1

  Sheathing Requirements

  International Residential Code, 2024 · Chapter 9, Roof AssembliesRead the full text (opens UpCodes in a new tab)

• R319.2.3

  Maximum Height From Floor

  Used in checks

  • The bottom of the escape opening is no more than 44 in above the floor.

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

• R332

  Stationary Fuel Cell Power Systems

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

• R905.2.7

  Ice Barrier

  International Residential Code, 2024 · Chapter 9, Roof AssembliesRead the full text (opens UpCodes in a new tab)

• R1003.3.1

  Vertical Reinforcing

  • Chimneys up to 40 in wide get four continuous No. 4 bars anchored in the foundation and grouted per R608.1.1, not bonded to the liner; add two bars per extra 40 in of width or part of it.

  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.