Manitowoc Published 06-24-16, Control # 241-01 2-13
2250 OPERATOR MANUAL SAFETY INFORMATION
the capacity chart and wire rope specification chart for
given boom point or jib point, whichever is less.
For example, if one load line is lifting from the jib point,
the proper jib chart applies.
• The crane must be thoroughly inspected by a qualified
person prior to setup.
• The crane must be thoroughly inspected for load line
interference caused by routing and reeving of multiple
load lines. If interference is found, it must be eliminated.
• For cranes produced before 2003, rated capacity
indicators/limiters were not required by ASME B30.5 for
non-personnel lifting.
To aid the operator in staying within the crane's capacity
chart with the total applied load, Manitowoc Cranes
recommends that its cranes be equipped with Rated
capacity indicators/limiters to monitor the load on each
load line.
NOTE: The operator is still responsible for knowing the
load and radius whether or not the crane is
equipped with load indicator(s).
• Manitowoc Cranes recommends that each load line be
equipped with an anti-two-block device.
• Manitowoc Cranes, capacity charts are based on freely
suspended loads. To prevent side load damage to the
boom, the jib, and the sheaves ensure the following:
- The load lines must hang as close to vertical as
possible to minimize side and forward loads.
The distance between the load points and the hook
points must be a minimum of three times the
horizontal distance between the hook points on the
load being lifted.
- The load must remain centered on the boom and jib
point shafts unless special lift approval is granted by
Manitowoc Cranes.
- The load lines should be located over the load’s
center of gravity as it is supported on a trailer, a
barge, or the ground.
• The crane operator shall be familiar with the
characteristics of the crane as it relates to multiple drum
operation (simultaneous operation, same or opposite
direction, or individual operation).
• When using tandem drums, the maximum operating
layers may be limited depending on whether the crane
was initially designed for tandem drum operation or not.
• The load shift when lifting with two hooks may be more
unpredictable than typical one-hook lifting.
Holding the Load
When a load is suspended, the operator shall follow these
precautions:
• Not leave his position at the controls
• Not allow personnel to stand or pass under the load
• Move all controls to off, apply all drum brakes, engage
the boom hoist pawl, and apply the swing and travel
brakes or locks
To Next Page
Loading...
Need help?
General
