Rigging work
11.2 Selecting the suitable site
Operating Instructions GMK5250L 3 302 633 en 11 - 11
27.09.2017
Load-bearing area
• Now calculate the required load-bearing area.
• Check that the surface of the outrigger pad (à p. 1 - 17) is larger than the
calculated ground bearing area. If the surface of the outrigger pad is
smaller, you will need to enlarge the load-bearing area.
Example for calculating the required load-bearing area:
If the outrigger pressure is 25 t and the ground has a bearing capacity of 40 t/m
2
.
Then the required load-bearing area for this supporting cylinder is 0.625 m
2
(= 6,250 cm
2
).
If the outrigger pad has a surface of 2,000 cm
2
, you would need to enlarge the
load-bearing area by placing packing under the outrigger pads; à p. 11 - 52.
G
Danger of overturning if the load-bearing area is too small!
Ensure that the actual load-bearing area is at least as large as specified in
the table.
This prevents the ground giving way and the truck crane overturning.
To Next Page
Loading...
