Abstract: According to an example aspect of the present invention, there is provided a hauling beam comprising at least two hauling beam modules, the modules comprising two nested beams, an outer beam and an inner beam, said nested beams configured to be movable longitudinally with respect to each other, wherein an inner beam of the first hauling beam module is connected to an inner beam of the second hauling beam module by a connector configured to transfer both forwards and backwards longitudinal movement of said inner beam of said first hauling module to the inner beam of said second hauling module.