Crane operation
Working range
Optimum working range:
XX°
B
A
XX° = optimum angle of main boom (between 15° and 30°, dependent on crane type).
When the main boom is below the horizontal the maximum lifting moment cannot be reached, therefore
you should avoid this position.
Refer to load capacity chart attached to the crane.
Lower range limit:
Danger!
Any working position with main boom completely lowered
is prohibited. In this position the crane may be overloaded.
Consequently the load may fall down. This creates an acute risk of
fatality for the operator and others.
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