Manitowoc GROVE GMK5150L, Operating Manual

Page: 760 / 1040

Rigging work
12.2 Choice of a suitable positioning site
12 - 12 3 302 709 en Operating manual
GMK5150L
1
2
.0
1.
201
8
Load bearing capacity of the ground
•
Find the load bearing capacity of the ground using the table.
H
If you are unsure about the load bearing capacity of the ground, have the
ground tested.
APPROXIMATE VALUES FOR THE LOAD BEARING
CAPACITY OF THE GROUND
Load bearing
capacity (t/m
2
)
(lbs/ft
2
)
Backfilled, not artificially compacted ground: 0 to 10
(0 to 2,050)
Natural, apparently undisturbed ground:
Mud, peat, marsh 0
Non-cohesive ground which
is sufficiently firm: Fine to
medium sand 15
(3,070)
Coarse sand
to gravel 20
(4,100)
Cohesive ground: Mushy 0
Soft 4
(820)
Stiff 10
(2,050)
Semi-solid 20
(4,100)
Hard 40
(8,200)
Rock with minimal fissures
in sound, unweathered con-
dition and with favourable
strata: In a compact
succession of
beds 150
(30,700)
In massive
or columnar
formation 300
(61,400)