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Table 24 (continued) Nailing for framing1 Construction Detail
Minimum Length of Nails, mm (in.)
Minimum Number or Maximum Spacing of Nails
Rafter plate to each ceiling joist
101
(4)
2
Rafter to joist (with ridge supported)
76
(3)
3
Rafter to joist (with ridge unsupported)
76
(3)
See Table 30
Gusset plate to each rafter at peak
57
(21⁄4)
4
Rafter to ridge board – toe nail – end nail
82
(31⁄4)
3
Collar tie to rafter – each end
76
(3)
3
Collar tie lateral support to each collar tie
57
(21⁄4)
2
Jack rafter to hip or valley rafter
82
(31⁄4)
2
Roof strut to rafter
76
(3)
3
Roof strut to loadbearing wall – toe nail
82
(31⁄4)
2
38 mm x 140 mm (2 in. x 6 in.) or less plank decking to support
82
(31⁄4)
2
Plank decking wider than 38 mm x 140 mm (2 in. x 6 in.) to support
82
(31⁄4)
3
38 mm (2 in.) edge laid plank decking to support (toe nail)
76
(3)
1
38 mm (2 in.) edge laid plank to each other
76
(3)
450 mm (18 in.) (o.c.)
Note to Table 24 1. Where the bottom wall plate or sole plate of an exterior wall is not nailed to joists or blocking, the exterior wall is permitted to be fastened to the floor framing by plywood, OSB, or waferboard sheathing that extends down over the floor framing and is fastened to that framing by nails or staples. The wall can also be fastened by tying the wall framing to the floor framing with galvanized strips that are 50 mm (2 in.) wide, 0.41 mm (0.016 in.) in thickness or more, spaced not more than 1.2 m (48 in.) apart and fastened at each end with at least two 63 mm (21⁄2 in.) nails.