Abstract: A continuous piece of concrete is first cast in an elongated casting mould mounted on a prestressing bench; after transfer of the prestressing force to the hardened concrete, the continuous piece of concrete is cut into a series of sections, each containing a certain number of railway ties. These sections are then removed from the casting mould, placed on a roller conveyor and then brought to a second cutting station where they are cut to form individual units. The invention also concerns a novel construction of a casting mould for the specific manufacture of such tie.