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8-1
8. HOW TO REFER TO WORKING RANGE CHART AND RATED LOAD CHART
WORKING RANGE
HEIGHT
(ft)
WORKING RADIUS (ft)
0°
1
2
3
4
5
6
Lift of hook
Lift of hook
Lift of hook
Lift of hook
Lift of hook
Lift of hook
Boom angle
BOOM LENGTH
80°
70°
60°
50°
40°
30°
20°
10°
11.9ft
19.2ft
26.4ft
33.6ft
40.7ft
47.9ft
35
0
5
10
15
20
25
30
40
45
50
55
5
10
15
20
25
0
35
40
45
50
30
09VL81070-W376C1UR
no-load and shift due to deflection of boom is not considered.
Note: The chart shows the data when the crane is operated with
Working range chart
Boom leng
th
A
B
Working radius
Boom angle
Lift above ground (H)
Working radius with
a cargo hoisted
Working radius before
hoisting cargo
These charts are stuck in front of crane operation levers and how to refer to charts is illustrated
as follows:
Although the point-A and the point-B follow
the tracks along the same working radius,
the point-A refers to the boom angle and the
point-B the lift above ground.
The working range chart does not incorporate
any shift due to deflection of boom.
Keep in mind that the actual working radius
is somewhat extended due to boom deflection
when a cargo is being hoisted.
The chart shows the relation among boom
length and working radius, boom angle, and
lift above ground.
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