Manitowoc Grove GMK4100L-1 Operating Manual page 758

Rigging work
12.2 Choice of a suitable positioning site
H
12 - 12
Load bearing capacity of the ground
•
Find the load bearing capacity of the ground using the table.
APPROXIMATE VALUES FOR THE LOAD BEARING
CAPACITY OF THE GROUND
Backfilled, not artificially compacted ground:
Natural, apparently undisturbed ground:
Mud, peat, marsh
Non-cohesive ground which is
sufficiently firm:
Cohesive ground:
Rock with minimal fissures in
sound, unweathered condition
and with favourable strata:
If you are unsure about the load bearing capacity of the ground, have the
ground tested.
3 302 690 en
Load bearing
capacity
(lbs/ft
(0 to 2,050)
Fine to
medium sand
Coarse sand
to gravel
Mushy
Soft
Stiff
Semi-solid
Hard
In a compact
succession of (30,700)
beds
In massive or
columnar (61,400)
formation
Operating manual
2
(t/m )
2
)
0 to 10
0
15
(3,070)
20
(4,100)
0
4
(820)
10
(2,050)
20
(4,100)
40
(8,200)
150
300
GMK4100L-1