Felbermayr-Engineered Solutions moves gantry crane with self-propelled vehicle
In mid-November, Felbermayr's Engineered Solutions division, which was founded in October last year, received an order to relocate a gantry crane in the port of Duisburg. Usually, such a relocation is associated with great effort. An effort that is also detrimental with costs in terms of the crane's standing time. However, this was prevented by a solution from Felbermayr-Engineered Solutions. “This meant the actual relocation of the crane took only about two hours.”
SPMTs and heavy duty towers in combined use
“The core of the solution was the combination of self-propelled vehicles or “SPMTs” (in Engl.: SPMT – Self-Propelled Modular Transporters), with what are known as heavy-duty towers,” explains Divisional Manager Kees Kompier. This type of operation was used for the first time at Felbermayr and required meticulous preparation in terms of the forces acting. It meant that the interaction of the technology used had to be taken into account through engineering know-how. This was the only way to ensure that the crane could be moved safely.
Two parallel SPMTs were used, each with twelve axle lines and a Powerpack as a drive. On top of this were two heavy-duty towers at the front and two at the back, with steel girders set up parallel to the SPMT to lift the load. These were connected to the second SPMT with two horizontal steel pipes each at the top and bottom. The structure was additionally stabilised with diagonally braced steel cables. The transport configuration thus reached the external dimensions of a cuboid with a side length of about 20 metres. “Calculating the suitability of this configuration was somewhat of a challenge,” Kompier notes, adding that the heavy-duty equipment used also had to be modified for practical implementation due to the lack of attachment points.
In the end, however, it was possible to drive under the portal of the 51-metre-wide GANTRY and lift it hydraulically with the SPMTs. The self-propelled vehicles then set off with the approximately 300-tonne load. Since the new crane tracks are about 170 centimetres above the ground level, a temporary embankment was built at the new crane parking area. Raising the 300-tonne load again put the configuration to the test, but thanks to correct engineering, it was perfectly executed. Thus, the crane reached its new “workplace” without having loosened even one screw on the lifting device.
“From lifting to setting down on the crane's new track, about 700 metres away, only about two hours had passed,” enthuses Kompier, proud of “his boys'” achievement.
The operation, which was carried out on behalf of the Port of Duisport, became necessary due to the construction of a new warehouse by the Felbermayr subsidiary Haeger & Schmidt and the resulting change in the layout of the site.