8
Pict. 3
!
• for brought-back or crumbling terrain safety distance (a) must be double of the slopes’ depth that is:
a = 2 • b
• for compacted, not crumbling terrain safety distance (a) must be equal to the slopes’ depth, that is:
a = 1 • b
Distance to be measured from point ©
Max. reaction on the ground varies according to the vehicle where the crane is installed.
IMPORTANT
The installer must calculate this max. reaction on the ground and applied the value on the ou-
trigger jacks.
5.3.3Safety distance from electrical power lines
Always keep a sufficient safety distance when you cannot avoid having electric power lines in the working
area of the crane. Special care must be taken when the power lines have not been disconnected by expe-
rienced people, or when the lines status is unknown.
Voltage
(V)
minimum
distance
(m)
(ft)
up to 1000 v
1
4
from 1 kV to 110 kV
3
10
from 110 kV to 220 kV
4
13
from 220 kV to 380 kV
5
16
DANGER
Always keep a sufficient safety distance from electric power lines. Follow present law regula-
tions. When the voltage of the lines is unknown keep a minimum safety distance of at least
5m (20 ft.)
5.3.4Crane and load ground connection
The crane can be electrostatically charged, especially when the additional bearing plates are made of insu-
lating materials (wood, plastics) It has to be noted that, even when the crane has been connected to ground,
the load can be loaded electrostatically charged, because the rope pulleys or the slings and ropes used to
lift the load are made of insulating materials.
DANGER
Always connect to ground both the crane and its load before starting operations
!
