Civil Engineering Reference
In-Depth Information
Figure 1-2 Smooth and barbed box nails, lbd size (shown full
size). Note the sharp point and thin, flat head.
Nails also have a variety of characteristics, including different
points, shanks, finishes, and material (see Figure 1-2). The following
shapes of points are available:
Common blunt pyramidal
Long sharp
Chisel-shaped
Blunt or shooker
Side-sloped
Duckbill or clincher
The heads may be
Flat
Oval or oval countersunk
Round
Double-headed
Each of the features or characteristics makes the nail better suited
for the job at hand. For example, galvanized nails are weather-
resistant, double-headed nails are good for framing where they can
be installed temporarily with the second head exposed for easy
pulling, and barbed nails are good when extra holding power is
required.
Tacks
Tacks
are small, sharp-pointed nails that usually have tapering sides
and a thin, flat head. The regular lengths of tacks range from
1
/
8
to
1
1
/
8
inches. The regular sizes are designated in ounces, according to
Table 1-1. Tacks are usually used to secure carpet or fabric.
Brads
Brads are small slender nails with small deep heads (see Figure 1-3).
Sometimes, instead of having a head, they have a projection on
one side. There are several varieties adapted to many different
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