Rigging work
12.2 Choice of a suitable positioning site
12 - 10 3 112 xxx en Operating Manual GMK6300L
xx.xx.xxxx
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 condition
and with favourable strata:
in a compact
succession of
beds
150
(30,700)
in massive or
columnar for-
mation
300
(61,400)
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