Manitowoc Grove GMK 4100L-1, Operating Manual

Page: 757 / 1016

Rigging work
12.2 Choice of a suitable positioning site
Operating manual 3 302 690 en 12 - 11
GMK4100L-1
2
3
.1
1.
201
7
12.2 Choice of a suitable positioning 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 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
--------
 
 
------------------------------------------------------------------------------------------------------------------------
=