Search the building code.

• R602.7.5

  Supports for Headers

  • Headers sit on jack studs or anchors, and exterior headers need full-height king studs: 1 to 4 per end as spans grow from 4 to 18 ft (fewer in low wind).

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

• R310.1.1

  Listings

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

• R803

  Roof Sheathing

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

• R602.10.6.5.4

  Length of Bracing

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

• R703.4.1

  Flashing Installation at Exterior Window and Door Openings

  • Window and door flashing drains to the face of the wall or the house wrap, with air sealing inside the gap; without instructions, use a sloped or sealed sill pan plus head and jamb flashing.

  International Residential Code, 2024 · Chapter 7, Wall CoveringRead the full text (opens UpCodes in a new tab)

• R502.3

  Allowable Joist Spans

  • Floor joist spans come from the span tables by species, grade, size, spacing and load; other cases use the AWC span tables.

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

• R704.2

  Exterior Soffit Installation Where the Design Wind Pressure Is 30 psf or Less

  • Up to 30 psf: vinyl or aluminum soffit fastened both ends with intermediate strips over 16 in; fiber-cement 1/4 in; hardboard 7/16 in and plywood 3/8 in nailed 6 in edge, 12 in field.

  International Residential Code, 2024 · Chapter 7, Wall CoveringRead the full text (opens UpCodes in a new tab)

• R802.8.1

  Bridging

  International Residential Code, 2024 · Chapter 8, Roof-Ceiling ConstructionRead 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.