Figure 4-56.Poles facing in a straight line.
After the pole has been plumbed, the hole is
backfilled and the backfill tamped down firmly.
Backfilling is done gradually, in shallow layers, with
each layer thoroughly tamped down. Usually two or
three crew members tamp, and one shovels. When the
hole has been filled to the ground line with tamped
backfill, the remaining excavated soil is banked in a
mound around the base of the pole to allow for
subsequent settling (fig. 4-58).
facing in opposite directions, as shown in figure 4-56.
This procedure, called facing "gain to gain" or "back to
back," provides for maximum strength in the line.
Poles are always faced in the direction of hills,
As a pole is being raised, it is safest to
curves, and dead ends, as shown in figure 4-57. This is
assume that at any moment something may slip
done to allow the most strain to be placed on the face and
or break Stand as far away from the pole as
against the curve of the poles.
possible if you are not in the raising crew.
After the pole has been faced, it must be plumbed
vertical. This is done by four pikers on four sides of the
pole, acting on signals given by one crew member who
sights along the line and another who sights from one
side. In some cases, a small amount of rake or lean
(approximately 12 inches) is left to allow for a wire
strain or the normal give of a guy.
The pike-pole method of setting poles
should not be used unless there are enough
crew members to do the work safely. In using
pikes the crew must stand far enough apart so
that they will not interfere with each other.
Never brace a pike pole on your stomach. If the
pole should happen to shift your way, you
would not be able to get clear. Unmanned pikes
alone should not be relied upon to support a
pole, while a crew member is on it. Pike-pole
tops should be kept covered at all times except
when actually in use.
Crew members should not be on poles,
while they are being plumbed, canted, or
Figure 4-57.Pole facing.
Guys are assembled using seven-strand galvanized
steel guy wire, a strain insulator (of a different design
from and not to be confused with the strain insulator
used for dead ending a conductor), and three bolt
clamps or preformed guy grips. The dimensioning of
the guy is determined by the height of the pole, by the
amount of strain to be counteracted, and by the climate
when the guy is installed. Figure 4-59 shows a typical
guy and the method of attaching the come-along for
tensioning the guy.
As previously discussed in this chapter, crossarms
come in various sizes and types, depending on the type
of system, size and number of conductors, and voltage
of the system.