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R602.7.5 Supports for Headers
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Headers shall be supported on each end with one or more jack studs or with approved framing anchors in accordance with Table R602.7(1) or R602.7(2). The full-height stud adjacent to each end of the header shall be end nailed to each end of the header with four-16d nails (3.5 inches × 0.135 inches). The minimum number of full-height studs at each end of a header shall be in accordance with Table R602.7.5.
MINIMUM NUMBER OF FULL-HEIGHT STUDS AT EACH END OF HEADERS IN EXTERIOR WALLSa
| MAXIMUM HEADER SPAN (feet) | ULTIMATE DESIGN WIND SPEED AND EXPOSURE CATEGORY | |
| < 140 mph, Exposure B or < 130 mph, Exposure C | ≤ 115 mph, Exposure Bb | |
| 4 | 1 | 1 |
| 6 | 2 | 1 |
| 8 | 2 | 1 |
| 10 | 3 | 2 |
| 12 | 3 | 2 |
| 14 | 3 | 2 |
| 16 | 4 | 2 |
| 18 | 4 | 2 |
For SI: 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s.
- For header spans between those given, use the minimum number of fullheight studs associated with the larger header span.
- The tabulated minimum number of full-height studs is applicable where jack studs are provided to support the header at each end in accordance with Table R602.7(1). Where a framing anchor is used to support the header in lieu of a jack stud in accordance with Note d of Table R602.7(1), the minimum number of full-height studs at each end of a header shall be in accordance with requirements for wind speed < 140 mph, Exposure B.