Part No. 57.0009.0404 GTH-4518ER - GTH-4020ER - GTH-6025ER 19
Operator’s Manual
First Edition - Third Printing
• The machine shall be parked on a ground
adequate to the maximum admissible payload. If
the subsoil collapses, the machine could tip over.
To avoid any risk of overturning, the following
precautions should be taken:
1. Ask your employer (site manager or manager
assistant) if there may be buried pipes, pits,
old tanks, cellar floor, dung yards, etc. under
the ground onto which the outriggers shall be
lowered.
2. A rough estimate of the ground consistency can be
done using the tables and picture in this page.
3. The resistance of the subsoil is in relation
to the ground type and geomorphological
characteristics.
Table 1 indicates the superficial pressure which
can be admitted under the outriggers of the
machine.
Type of ground,
geomorphological
features
Admissible
superficial pressure
kg/cm
2
N/mm
2
loose, non-compact soil
generally speaking,
not solid;
special precautions
needed
loamy, peaty,pasty soil
rippable, soft ground
non-cohesive, well com-
pact soil, sand, gravel
2.0
0.2
rippable
soil
solid
1.0
0.1
semi-solid
2.0
0.2
hard
4.0
0.4
Rocks, concrete, heavy
traffic paved roads
above
10.0
above
1.0
Table 1
WARNING
Make sure the machine (wheels and stabilisers)
rests on a firm ground to prevent hazardous unstable
conditions.
If the ground is not firm enough, position some
supporting planks under the stabilisers or the wheels.
These plates must grant a specific pressure of 1.2 to
1.5 kg/cm
2
(800x800
mm plates are sufficient).
• Look for the best route to the job site.
• When the machine is running, nobody can enter
its working range.
• While working, keep the working area in order.
Never leave objects scattered: they could hinder
the machine movements and represent a danger
for personnel.
• In presence of trenches, lower the outriggers at
a safe distance from the trench edge.
Safety precautions
The distance (a) from the foot of the overhang
shall be adequate to height (h) of the same
overhang.
If the ground fulfils the required conditions:
a : h = 1 : 1
(values with a grey background in table 1)
In the case of doubts:
a : h = 2 : 1
Bearing Capacity
Supporting
Surface
Overhang foot
Summary of Contents for Genie GTH-4020 ER
Page 188: ......
