Figure 2-3.
Cable crossing under railroad tracks.
PART C - AERIAL CONSTRUCTION
18. Aerial construction is the most difficult and time consuming part of
cable construction you will experience. There are different ways to get the
cable across the road using aerial, but not all will be available to you
everywhere.
19. One method is using existing telephone poles.
However, you must
consider the amount of sag that will be in the cable as it crosses the road.
(Sag will be discussed later.) If the poles have power lines on them, you
must consider the distance needed to protect you and the cable.
If the
poles have communications cables on them, you must have enough room to
either clear under the existing construction or have room above to use for
your cable.
20. If poles are not present, you might want to consider having them
installed. This is time consuming and requires special equipment that may
not always be available. However, it is the safest place for your cable.
21. Let us assume you decided the poles were present.
They met all the
requirements for safety of the climber and the cable and they are where you
need them. You must secure the cable to a stake placed one foot from the
base of the pole.
Tag the cable on the standing end.
The climber will
place the cable over his shoulders and begin the climb to the top.
2-5
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