The SMK rails manipulation set replaces the original ZPK – 56 rail lifting, transport and replacement device (so-called “MAMATĚJ”). The gantry structure is welded from cylindrical profiles, pipes and sheets. The lifting and lowering of the ratchet lift is controlled by a hand lever, which replaces the original chain drive. The gantry manipulator is placed in the frame of the trolley, which is equipped with travel rollers. To ensure the minimum forces required for the trolley to travel, the rollers are mounted on rolling bearings. The travel of the gantry manipulator trolley along the structure is ensured by a handwheel with a sprocket that fits into the roller chain located in the frame of the gantry manipulator structure. This solution prevents damage to the chain during manipulation at the workplace. The position of the ratchet lift trolley on the structure’s travel path can be ensured along the entire length of the travel in increments of 13 mm. The ratchet lift trolley is secured with a clip to prevent it from falling out of the structure of the gantry crane. The SMK is equipped with a low four-wheel chassis with 4 to 6 hangers for hanging the transported rails. It is transported either by a driving vehicle, a work truck, or a motorized trolley using a rigid coupling.