Rigging work
11.2 Selecting the suitable site
Operating Instructions GMK5250L 3 302 633 en 11 - 9
27.09.2017
11.2 Selecting the suitable site
Choose the position of your truck crane at the site with care. Observe the
following aspects:
– Check that the ground has sufficient load bearing capacity. You may need
to enlarge the ground bearing area;
à p. 11 - 9.
– Observe the required safe distances from slopes and pits;
à p. 11 - 12.
– Earth the truck crane if there is a danger of it being charged with static
electricity;
à p. 11 - 13.
– Keep a safe distance away from electrical lines;
à p. 11 - 13.
– 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.
11.2.1 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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