strength at the ground line.
Table 4
be decreased in theater of operations
gives the recommended setting depths
construction where safety factors are
in soil and in rock.
The actual
reduced.
The engineer officer must
setting or installation of the poles
use sound judgment in establishing
is done by one of three methods: by
minimum
clearances
for
a
given
hand, with a crane, or by using a
project, taking into
nearby pole as a gin pole.
e. Clearances.
Minimum clearances
of conductors over ground, rails, and
other objects are given in figure 10.
Special consideration must be given to
railroad yards and material handling
areas.
Allow a minimum horizontal
clearance
of
11
inches
from
the
outside face of a curb or roadbed to
the face of the pole to prevent damage
Figure 11.
Illustration of sag.
by vehicles. The clearances shown may
Table 5.
Line Wire Sag in Inches
Table 6.
Service Drop Wire Sag in Inches
2-17
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