Manitowoc Published 03-29-17, Control # 064-23 3-71
14000 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
WIND CONDITIONS
Wind adversely affects lifting capacity and stability as shown
in Figure 3-71
. The result could be loss of control over load
and crane, even if load is within the crane’s capacity.
Wind speed (to include wind gusts) must be monitored by job
planners and supervisors.
The wind speed at boom or jib point can be greater than wind
speed at ground level. Also be aware that the larger the sail
area of the load, the greater the wind’s affect on the load.
As a general rule, ratings and operating speeds must be
reduced when:
Wind causes load to swing forward past allowable
operating radius or sideways past either boom hinge
pin.
For wind conditions specific to this crane, see Wind
Conditions Chart at end of this section or, if applicable, see
wind conditions in Capacity Charts provided with crane and
attachments.
WARNING
Tipping Crane Hazard!
Judgment and experience of qualified operators, job
planners, and supervisors must be used to compensate
for affect of wind on lifted load and boom by reducing
ratings or operating speeds, or a combination of both.
Failing to observe this precaution can cause crane to tip
or boom and/or jib to collapse. Death or serious injury to
personnel can result.
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