Rigging work
12.2 Choosing a suitable site
Operating manual GMK 6400 3 112 993 en 12 - 9
12.07.2013
12.2 Choosing a suitable site
Choose the position of your truck crane at the site with care. Observe the fol-
lowing aspects:
– Check whether the ground has sufficient load bearing capacity. You may
need to enlarge the ground bearing area;
à p. 12 - 9
– Observe the required safe distances from slopes and pits;
à p. 12 - 12
– Earth the truck crane if there is a danger of it being charged with static
electricity;
à p. 12 - 13
– Keep a safe distance away from electrical lines;
à p. 12 - 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 - 15
– 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 ground bearing area
The stability of the truck crane primarily depends on the load bearing capac-
ity of the ground. The load bearing capacity of the ground and the occurring
outrigger pressure determine the ground bearing area required for the
operation.
Outrigger pressure
• Determine the outrigger pressure for the operation planned using the
Outrigger pressure table.
s
surface area m
2
()
outrigger pressure (t)
loadbearing
capacity of the ground
t
m
2
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