Manitowoc 777 User Manual

Reference Only
OPERATING CONTROLS AND PROCEDURES 777 OPERATOR’S MANUAL
3-62 Published 10-01-12, Control # 044-05 v2
The wind’s affect on the rear of the load
increases load radius. This condition can result
in an overload hazard, possibly causing the
crane to tip or the boom to collapse.
To avoid this hazard, reduce operating speeds
and load (see appropriate table for
recommended capacity reductions).
Boom strength is affected the most
when the wind acts on the side of
the boom.
The boom can buckle and collapse if
the load contacts the boom.
Backward stability is affected by wind
on the front of the boom. This
condition is especially dangerous
when the boom is at or near the
maximum angle when operating
without load.
Wind forces on the front of the boom
reduce the normal forward tipping
effect of the boom. The crane can tip
or the boom can collapse if this
condition is not avoided.
Forward stability is affected by wind
on the rear of the boom. Wind
applies a force to the boom and load
that adds to the crane’s overturning
moment. This action has the same
effect as adding load to the hook.
The wind’s affect on the side of the
load can cause the load to swing
out past the boom hinge pin. This
condition can result in excessive
side load forces on the boom,
possibly causing the crane to tip or
the boom to collapse.
To avoid this hazard, reduce
operating speeds and load (see
appropriate table for
recommended capacity
reductions).
FIGURE 3-36
A1019

Manitowoc 777 Specifications

General

Brand	Manitowoc
Model	777
Category	Construction Equipment
Language	English