Rigging work
11.2 Selecting the suitable site
11 - 10 3 302 633 en Operating Instructions GMK5250L
27.09.2017
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 soil: mushy 0
soft 4
(820)
stiff 10
(2,050)
half firm 20
(4,100)
hard 40
(8,200)
Rock with minimal fissures in
sound, unweathered condition
and with favourable strata:
In closed
sequence of
beds
150
(30,700)
In massive or
columnar
formation
300
(61,400)
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