Side lift spreader for lifting intermodal container

A container lifting arrangement comprising:

• a lifting truck provided with a mast;
• a truck mast coupling mounted on a main beam of a side lift spreader, the truck mast coupling configured to be connected to the mast of the lifting truck, and the main beam extending in a longitudinal direction;
• the side lift spreader for lifting an intermodal transport container, the spreader comprising:
• a pair of container locking arrangements, each of said container locking arrangements being located at a respective longitudinal end of the spreader and being configured to be connected to a respective top corner casting of the container;
• and
• a container side support configured to support a longitudinal side of the container at a position vertically lower than the pair of container locking arrangements, wherein the main beam comprises:
• a vertical carrier plate having a longitudinal axis extending in said longitudinal direction, the vertical carrier plate having a first vertical height and being made of a steel plate having a first thickness,
• a C-beam extending in the longitudinal direction and comprising a first horizontal flange and a second horizontal flange interconnected by a vertical web portion, the C-beam having a second vertical height that is lower than the first vertical height and being made of a steel plate having a second thickness that is thinner than the first thickness, the first horizontal flange of the C-beam being welded to the vertical carrier plate along a first longitudinal weld and the second horizontal flange of the C-beam being welded to the vertical carrier plate along a second longitudinal weld such that the C-beam defines, together with the vertical carrier plate, a closed channel beam with a first flange of the vertical carrier plate extending vertically from the closed channel beam, and
• an inclined support plate extending along the longitudinal direction, the inclined support plate being welded to the vertical carrier plate along a third longitudinal weld, and to an outer face of the first horizontal flange of the C-beam along a fourth longitudinal weld, the fourth longitudinal weld being located at a distance from the vertical carrier plate.