needed depends on the weight of the pole. The
procedure is as follows:
a. Dig a hole about 2 feet deep for the base of
the gin pole.
b. Run out the guys to their respective
anchorages and assign a man to each anchorage to
control the slack in the guy line with a round turn around
the anchorage as the pole is raised. If it has not been
done already, install an anchorage for the base of the
c. If necessary, the tackle system used to raise
and lower the load can be used to assist in raising the
gin pole, but the attaching of an additional tackle system
to the rear guy line is preferable. Attach the running
block of the rear guy line tackle system (fig. 6-52) to
the rear guy line end which at this point is near the base
of the gin pole. The fixed or stationary block is then
secured to the rear anchor. The fall line should come out
of the running block to give greater mechanical
advantage to the tackle system. The tackle system is
stretched to the base of the pole before it is erected to
prevent the chocking of the tackle blocks during the
erection of the gin pole.
d. Keep a slight tension on the rear guy line,
and on each of the side guy lines, haul in on the fall line
of the tackle system while eight men (more for larger
poles) raise the top of the pole by hand until the tackle
system can take control.
e. The rear guy line must be kept under tension
to prevent the pole from swinging and throwing all of
its weight on one of the side guys.
f. When the pole is in its final position,
approximately vertical or inclined as desired make all
guys fast to their anchorages with the round turn and
two half hitches. It is often advantageous to double the
portion of rope used for the half hitches.
g. Open the leading block at the base of the gin
pole and place the fall line from the tackle system
through it. When the leading block is closed, the gin
pole is ready for use. If it is necessary to move (drift)
the top of the pole without moving the base, it should
be done when there is no load on the pole unless the
guys are equipped with tackle.
3. Operating. The gin pole is perfectly suited to
vertical lifts. It also is used under some circumstances
for lifting and pulling at the same time so that the load
being moved travels toward the gin pole just off the
ground. When used in this manner, a snubbing line of
some kind must be attached to the other end of the load
being dragged and kept under tension at all times. Tag
lines are to be used to control loads being lifted
vertically. A tag line is a light line fastened to one end
of the load and kept under slight tension during hoisting.
A tripod consists of three legs lashed or secured at
the top. The advantage of the tripod over other rigging
installations is its stability, and it requires no guy lines
to hold it in place. The disadvantage of a tripod is that
the load can be moved only up and down. The load
capacity of a tripod is approximately 1 1/2 times that
of shears made of the same-size material.
Figure 6-51.Erecting a gin pole.