a. Lumber is sawn in standard (nominal) sizes:
Length: 8, 10, 12, 14, 16, 18, and 20 feet.
Width: 2, 4, 6, 8, 10, and 12 inches.
Thickness: 1, 2, and 4 inches.
The actual width and thickness of dressed lumber are less than the
sawn dimensions because of drying and planing (or finishing). For
the relative difference between sawn (rough or nominal) dimensions,
and actual sizes of construction lumber, see Table 16.
b. Plywood is usually 4 feet by 8 feet and varies in thickness
from 1/8 to 1 inch.
c. Stock panels are usually 48 inches wide; lengths vary in
multiples of 16 inches (up to 8 feet) because the accepted spacing
for studs and joists is 16 inches.
1-9. Nails. Nails are the most commonly used items that are under
the classification of rough hardware.
a. Types. Nails come in different sizes and are divided into two
general types: wire and cut. Also, special nails are available for
some jobs.
(1) Wire Nails. Wire nails are divided into five main types:
finishing, casing, box, common, and duplexhead.
Table 1-6.
Nominal and dressed sizes of lumber
EN5155
1-30
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