Rigging work
12.2 Choice of a suitable positioning site
Operating manual 3 302 736 en 12 - 11
GMK4090
xx.xx.xxxx
12.2 Choice of a suitable positioning site
Choose the position of your truck crane at the site with care. Observe the fol-
lowing aspects:
– Check that the ground has sufficient load bearing capacity. You may need
to enlarge the load-bearing area;
à p. 12 - 11.
– Observe the required safe distances to slopes and pits;
à p. 12 - 14.
– If there is a danger of it becoming charged with static electricity, earth the
truck crane;
à p. 12 - 15.
– Keep a safe distance to electrical cables;
à p. 12 - 15.
– Choose the site such that the unevenness of the ground can be compen-
sated for by adjusting the outrigger cylinders. Maximum hoist of the out-
rigger cylinders;
à p. 1 - 17.
– Choose a location where it is possible to keep the working radius to a min-
imum and where no obstacles are within the slewing range of the crane.
12.2.1 Determining the required load-bearing area
The stability of the truck crane depends in the first instance on the load bear-
ing capacity of the ground. The load bearing capacity of the ground and the
occurring outrigger pressure determine the load-bearing area required for
the operation.
Outrigger pressure
• Determine the outrigger pressure for the operation planned using the
Outrigger pressure table.
s
Load-bearing area m
2

Outrigger pressure (t)
Load bearing capacity of the ground
t
m
2
--------


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