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R602.7.3 Wood Structural Panel Box Headers

Colorado Residential Code 2021 > 6 Wall Construction > R602 Wood Wall Framing > R602.7 Headers > R602.7.3 Wood Structural Panel Box Headers
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Wood structural panel box headers shall be constructed in accordance with Figure R602.7.3 and Table R602.7.3.
TABLE R602.7.3
MAXIMUM SPANS FOR WOOD STRUCTURAL PANEL BOX HEADERSa
HEADER CONSTRUCTIONb HEADER DEPTH (inches) HOUSE DEPTH (feet)
24 26 28 30 32
Wood structural panel—one side 9 4 4 3 3 —
15
5
5
4
3
3
Wood structural panel—both sides 9 7 5 5 4 3
15
8
8
7
7
6
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
  1. Spans are based on single story with clear-span trussed roof or two story with floor and roof supported by interior-bearing walls.
  2. See Figure R602.7.3 for construction details.

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
Notes:
  1. The top and bottom plates shall be continuous at header location.
  2. Jack studs shall be used for spans over 4 feet.
  3. Cripple spacing shall be the same as for studs.
  4. Wood structural panel faces shall be single pieces of 15/32-inch-thick Exposure 1 (exterior glue) or thicker, installed on the interior or exterior or both sides of the header.
  5. Wood structural panel faces shall be nailed to framing and cripples with 8d common or galvanized box nails spaced 3 inches on center, staggering alternate nails 1/2 inch. Galvanized nails shall be hot-dipped or tumbled.
FIGURE R602.7.3
TYPICAL WOOD STRUCTURAL PANEL BOX HEADER CONSTRUCTION

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