Schwing SPB 28, Руководство по эксплуатации

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GENERAL RULE S
700+smgr.fm
PAGE 15
S AF ETY M AN U AL
6.9
Depth perception varies from person to person and is affected
by the distance from the objects being observed. Minimum distances from power
lines and other obstructions during setup should always be judged from a viewing
position that does not require depth perception judgements. See Figure 17. If
power lines are in the area of expected boom movement, a spotter must be
employed whose only job is to observe the safety distance between the power
lines and the boom and to alert the operator if the safety distance is compromised.
See the glossary for the definition of spotter.
DANGER
Will it hit the wires?
You can’t tell from here.
Get the best possible
vantage point
sptpostn.eps
dpthprct.eps
From the vantage point of
this operator, it would be
extremel
y difficult to tell if
the end of the boom will
contact the wires.
dpthprcp1.eps
Where power lines are within 20 feet of the area to be poured (5 0 feet for lines
over 3 5 0 Kv), a dedicated spotter must be emplo y ed to observe movements of
the boom. DO N OT REL Y O N D EP TH PER C EP T I O N W I TH P OW ER LINE S!
Figure 17
Never rely on depth perception with power lines
From the vantage point of
this operator, it would be
extremel
y difficult to tell if
the end of the boom will
contact the wires.
dpthprcp1.eps
Where power lines are within 20 feet of the area to be poured (5 0 feet for lines
over 3 5 0 Kv), a dedicated spotter must be emplo y ed to observe movements of
the boom. DO N OT REL Y O N D EP TH PER C EP T I O N W I TH P OW ER LINE S!