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Grove
Published 3-22-2021, Control # 702-02
2-7
GRT8120 OPERATOR MANUAL
SAFETY INFORMATION
2
KEEP THE BOOM SHORT. Swinging loads with a long line
can create an unstable condition and possible structural
failure of the boom.
Load Charts
Load Charts
represent the absolute maximum allowable
loads, which are based on either tipping or structural
limitations of the crane under specific conditions. Knowing
the precise load radius, boom length, and boom angle
should be a part of your routine planning and operation.
Actual loads, including necessary allowances, should be
kept below the capacity shown on the applicable
Load Chart
.
Load Chart
capacities are based on freely suspended loads.
You must use the appropriate
Load Chart
when determining
the capability of the crane in the configuration required to
perform the lift.
Maximum lifting capacity is available at the shortest radius,
minimum boom length, and highest boom angle.
Do not remove the
Load Charts
from the crane.
Work Site
Prior to any operation, you must inspect the
entire
work site,
including ground conditions, where the crane will travel and
operate. Make sure that the surfaces will support a load
greater than the crane’s weight and maximum capacity.
Be aware of all conditions that could adversely effect the
stability of the crane.
Be aware of the danger for people entering the working area.
Do not allow unnecessary personnel in the vicinity of the
crane while operating.
WIND FORCES
There are basic principles that must be followed while
operating in windy conditions. This information has been
provided to assist in determining safe operation in windy
conditions.
Always use extreme caution when windy conditions exist.
NEVER exceed the rated capacity shown on the
Load Chart
.
Always check the
Load Chart
to make sure that the load
to be lifted is within the rated capacity of the crane.
Wind can have a significant effect on loads that may be lifted
by a crane. Wind forces act differently on a crane depending
upon the direction from which the wind is blowing (e.g., wind
on the rear of the boom can result in decreased forward
stability, wind on the underside of the boom can result in
decreased backward stability, wind on the side of the boom
can result in structural damages, etc.)
Wind forces can exert extreme dynamic loads. Grove
recommends that a lift not be made if the wind can cause a
loss of control in handling the load.
Wind forces can be determined by typical visible effects on
the landscape.To assist you in determining prevailing wind
conditions, refer to Table 2-1.
NOTE:
The wind speed corresponding to the Beaufort
scale in the table is mean wind speed at 10 m
(33 ft) elevation over a period of 10 minutes.
Содержание Grove GRT8120
Страница 1: ...Operator Manual Grove GRT8120 ...
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Страница 16: ...TABLE OF CONTENTS GRT8120 A 12 THIS PAGE BLANK ...
Страница 24: ...INTRODUCTION GRT8120 OPERATOR MANUAL 1 8 Published 3 22 2021 Control 702 02 THIS PAGE BLANK ...
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Страница 182: ...OPERATING PROCEDURES GRT8120 OPERATOR MANUAL 4 52 Published 3 22 2021 Control 702 02 FIGURE 4 54 ...
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