Schwing SPB 28, Operation Manual

Page: 65 / 216

GENERAL RULE S
700+smgr.fm
PAGE 35
S AF ETY M AN U AL
8.9
When power lines are in the area where the boom will be
moving to complete a pour, a spotter must be employed whose only job is to
warn the operator if the boom comes within 20 feet (50 feet above 350 Kv) of
power lines.
The spotter must understand the responsibilities assigned, and must
be able to judge a 20- or 50-foot distance. If possible, help the spotter by provid-
ing a visual aid on the ground, such as cones, which represent the beginning of the
danger zone (Figure 45).
8.10
Direct contact with a live power line is always dangerous to
anyone and everyone electrically connected to the machine (Figure 46). Use
extreme caution near power lines.
8.11
Do not rely on depth perception when working near power
lines. You must use a spotter! (Figure 46.) See the definition of “spotter” in the
glossary found in the Appendix of this Safety Manual .
DANGER
cones.eps
Figure 45
Use of cones as a visual aid for the spotter and operator
DANGER
DANGER
From the vantage point of
this operator, it would be
extremely difficult to tell if
the end of the boom will
contact the electric wires.
dpthprcp 2 .eps
During operation, the spotter must stand in this position.
DO NOT RELY ON DEPTH PERCEPTION WITH
POWER LINES!!
Figure 46
Never rely on depth
perception with power lines