Folio 1064-3
PEDESTAL/BARGE MOUNTED CRANES
CAPACITY CHARTS
Manitowoc Cranes provides two types of capacity charts for
a crane mounted on a barge or other supporting structure
under static conditions.
1.
A capacity chart based on tipping when the crane is
anchored only to prevent shifting.
2.
A capacity chart based on structural competence when
the crane is securely fastened for use as a pedestal
mounted crane.
NOTE:
Unless otherwise specified on a machine list
capacity chart, a "0" degree machine list capacity
chart rating applies to machine list
not to exceed
1/2 degree
. All other machine list ratings — 1°, 2°,
and 3° — must NOT be exceeded.
SHOCK LOADING
Definition
Shock loads to the crane can be experienced when the
barge is subjected to up and down movement of wave action
(referred to as DYNAMICS). Figur e6 illustrates the dynamic
conditions of the barge which influence crane capacity.
NOTE:
Manitowoc does not recommend crane operation
under dynamic conditions. However, if operation
under dynamic conditions is required, Manitowoc
Cranes will consider issuing a capacity chart for
dynamic conditions only after the crane user has
provided the information listed on “Technical Data
Sheet, T.S.100”. This technical data sheet is
available to the crane user upon request.
OPERATION ON BARGE
General
Machine list and/or dynamics will be experienced when a
crane is operated on a barge, ship or floating platform. Both
of these conditions reduce the crane’s capacity, and each
must be taken into account for safe operation on a barge,
ship or floating platform.
CAUTION
Structural Damage Hazard!
If crane boom or structure is shock loaded during
operation, or there is any indication of shock loading, all
structural components of crane shall be inspected to
detect cracks and other damage. Nondestructive test
equipment, such as magnetic particle or ultrasonic
procedures, is recommended for this inspection.
WARNING
Tipping Crane Hazard!
Tie-downs which only prevent crane from shifting as in
barge, ship or floating platform mounting, may not provide
adequate support when using a capacity chart for
pedestal mounting. Before operating a crane on a barge,
ship or floating platform, crane user shall verify that
correct capacity chart is being used — pedestal mounted,
barge mounted, 0°, 1°, 2° or 3° list or dynamic capacity
chart.
Failing to use correct capacity chart can result in an
accident.
FIGURE 6
X
Z
Y
A839
AXIS TRANSITIONAL ROTATIONAL
SYMBOL NAME STATIC DYNAMIC STATIC DYNAMIC
X Longitudinal Surge Heel List Roll
Y Vertical Heave Yaw
Z Lateral Sway Trim Pitch
395143
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