Gantry cranes, the general areas of utilization being open spaces can also be used in closed spaces and in factory areas. Their bridging girders the designed according to the DIN 15018 standard in a manner to deflect maximum 1/1000 under max. load and are manufactured from St37 material. Bridge main welds are welded with submerged welding robots. Box construction bridge girders are reinforced at 600mm intervals to breakwaters and side sheets with angle girders from end to end.