2-20
Looking at the "360° ROTATION, ON RUBBER" column, we must use the capacity at
the 16 ft (4.5 m) radius, which is the next larger radius on the chart from the actual load
radius of 14.5 ft (4.4 m). The capacity on rubber is 8300 lbs (4320 kg). This leaves the
ON OUTRIGGERS columns. The outriggers should always be used whenever possible
anyway. We see that we can lift up to 16900 lbs at a 20 ft load radius (7850 kg at a 6.0
m load radius). If possible, the crane should be positioned to lift the load over the front.
This is the best position for stability. However, in this example, the load must be lifted
over the side.
The load can be lifted, swung over the front. The boom can be retracted to set down at
a 12' (3.7 m) load radius. The outriggers can now be raised. Checking the chart, we
see that the capacity at 12' (4.0 m) is 22500 lbs (12290 kg). The load can be picked up
and transported, provided the surface is smooth, level and paved.
Courtesy of Crane.Market
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