|
|
|
|
|
Working ground pressure figures are based on the Maximum Lifting Capacity of the Sidelifter. Designers should take into account the fact that Sidelifters can lift heavier loads than their Maximum Lifting Capacity because of their built-in safety margins. The strength of surfaces on which a Sidelifter will operate should allow for this. Based on the Maximum Lifting Capacity of the Sidelifter, ground pressures and loading per square foot are:
Model |
Weight of box at Max MLC*: |
Load per Foot |
Ground Pressure |
SB300 |
30 tonnes |
21 tonnes |
1.3 MPa |
*MLC= Maximum Lifting Capacity
Max. Ground Pressure = Max. Load per foot / area of stabiliser foot.
|
Where the pre-operational risk assessment reveals the presence of cellars, underground services, ducts or the like, a competent person must assess whether the ground is stable enough to support the load of the stabiliser foot. |
All lifting arms are constructed from continuously welded high tensile steel. The high base is also constructed from high tensile steel. The low base is fabricated from medium tensile steel.
The pins are mounted in replaceable lubricated glacier bearings.
The two low crane modules can be stowed in a low folded position. This enables Sidelifters to be loaded at ports or container terminals by other equipment with the minimum of obstruction or damage. This also reduces wear and tear on the cranes when in transport mode. The low cranes stow below the deck height, i.e. under the container. This feature makes opening container doors possible when a low crane is fitted at the rear.
|
The crane modules are designed to lift containers and must not be used to drag containers along the ground. The lifting chains must not be attached to the top of containers, or to non-standard length containers, as this imposes a sideways loading on the crane modules beyond their designed purpose. |
