Figure 4-60.Crossarm, showing proper way to attach a handline.
On most pole-line construction, the installation of
hardware and crossarms is accomplished on the ground
before setting the pole. This is the easiest and most
efficient method; however, sometimes it is necessary to
upgrade or build on to an existing system, and then the
arm must be installed on a pole that is already standing.
When the crossarm is mounted on the pole before
the pole is set, the through bolt is tightened, but the
crossarm braces are left hanging loose. Once the pole is
set, the crossarm is leveled and the braces are secured to
the pole. Finally, the through bolt is drawn completely
When the crossarm is mounted after the pole is set,
it is pulled up to a lineman in a working position by a
helper on the ground, using a handline attached, as
shown in figure 4-60. With the handline attached in this
fashion, the lineman can, after he inserts the through
bolt, cast off the upper half-hitch, and the helper on the
ground can then heave the crossarm level.
Braces are usually fastened to a crossarm with
3/8-inch by 4-inch carriage bolts. Each brace comes
down diagonally and is attached to the pole at the lower
end with a 1/2-inch lag screw.
Figure 4-61.Dead-end secondary rack.