My Library

Table 41 Dimensions for wood-strip flooring Minimum Thickness of Flooring, mm (in.)
Type of Flooring
Maximum Joist Spacing, mm (in.)
With Subfloor
No Subfloor
Matched hardwood (interior use only)
400 (16) 600 (24)
7.9 (5⁄16) 7.9 (5⁄16)
19.0 (3⁄4) 33.3 (15⁄16)
Matched softwood (interior or exterior use)
400 (16) 600 (24)
19.0 (3⁄4) 19.0 (3⁄4)
19.0 (3⁄4) 31.7 (11⁄4)
Square edge softwood (exterior use only)
400 (16) 600 (24)
– –
25.4 (1) 38.1 (11⁄2)
Table 42 Nailing of wood-strip flooring Finish Floor Thickness, mm (in.)
Minimum Length of Flooring Nails, mm (in.)
Maximum Spacing of Flooring Nails, mm (in.)
7.9 (5⁄16)
38 (11⁄2)
200 (8)
11.1 (7⁄16)
51 (2)
300 (12)
19.0 (3⁄4)
57 (21⁄4)
400 (16)
25.4 (1)
63 (21⁄2)
400 (16)
31.7 (11⁄4)
70 (23⁄4)
600 (24)
38.1 (11⁄2)
83 (31⁄4)
600 (24)
Note to Table 42 1. Staples are permitted to be used to fasten wood strip flooring not more than 7.9 mm (5⁄16 in.) in thickness provided the staples are not less than 29 mm (13⁄16 in.) long with a shank diameter of 1.19 mm (0.047 in.) and a width of 4.7 mm (3⁄16 in.) crowns.