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• R503.2.2

  Allowable Spans

  • Panel subfloor spans follow the span rating table or APA E30; the common subfloor ratings are 16, 20, 24, 32 and 48 in on center.
  • Sanded plywood used as combination subfloor is at least 1/2 to 1 in thick depending on species group and 16 to 24 in joist spacing.

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

• R606.13.2.1

  Bonding With Wall Ties

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

• R608.8.2.1

  Lintels Designed for Gravity Load-Bearing Conditions

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

• R302.9.3

  Testing

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

• R606.3.5

  Grouting Requirements

  • Grout goes in within 1-1/2 hours, consolidated twice, in lifts of 8 ft or less (64 in with special inspection over 8 ft), never through aluminum pipe; cleanouts are needed over 64 in.

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

• R404.1.3.3.2

  Concrete Mixing and Delivery

  • Ready-mix concrete is batched and delivered per ASTM C94 or C685.

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

• R301.2.2.2

  Weights of Materials

  • In seismic areas, average dead loads stay at or under these limits.

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

• R905.7.2

  Slope

  International Residential Code, 2024 · Chapter 9, Roof AssembliesRead 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.