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R803.2.3.1 Sheathing Fastenings
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Wood structural panel sheathing shall be fastened to roof framing in accordance with Table R803.2.3.1. Where the sheathing thickness is 15/32 inches and less, sheathing shall be fastened with ASTM F1667 RSRS-01 (23/8" × 0.113") nails. Where the sheathing thickness is greater than 15/32 inches, sheathing shall be fastened with ASTM F1667 RSRS-03 (21/2" × 0.131") nails or ASTM F1667 RSRS-04 (3" × 0.120") nails. RSRS-01, RSRS-03 and RSRS-04 are ring shank nails meeting the specifications in ASTM F1667.
ROOF SHEATHING ATTACHMENTa, b
| Rafter/Truss Spacing 24 in. o.c. | WIND SPEED | |||||||||||||||
| 115 mph | 120 mph | 130 mph | 140 mph | 150 mph | 160 mph | 170 mph | 180 mph | |||||||||
| E | F | E | F | E | F | E | F | E | F | E | F | E | F | E | F | |
| Exposure B | ||||||||||||||||
| Rafter/Truss SG = 0.42 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 4 | 4 | 4 | 4 | 4 | 4 |
| Rafter/Truss SG = 0.49 | 6 | 12 | 6 | 12 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Exposure C | ||||||||||||||||
| Rafter/Truss SG = 0.42 | 6 | 6 | 6 | 6 | 6 | 6 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 |
| Rafter/Truss SG = 0.49 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 4 | 4 | 4 | 4 |
| Exposure D | ||||||||||||||||
| Rafter/Truss SG = 0.42 | 6 | 6 | 6 | 6 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 |
| Rafter/Truss SG = 0.49 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
E = Nail spacing along panel edges (inches)
F = Nail spacing along intermediate supports in the panel field (inches)
- For sheathing located a minimum of 4 feet from the perimeter edge of the roof, including 4 feet on each side of ridges and hips, nail spacing is permitted to be 6 inches on center along panel edges and 6 inches on center along intermediate supports in the panel field.
- Where rafter/truss spacing is less than 24 inches on center, roof sheathing fastening is permitted to be in accordance with the AWC WFCM or the AWC NDS.
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