Abstract: The invention relates to a method and apparatus for the manufacture of a screw-line shaped reinforcement spiral out of metal wire for the reinforcement of concrete pipes or columns. The wire is, while subject to tensile stress, wound onto a cylindrical last whose diameter is equal to the inner diameter of the spiral. The wire, before coming onto the last, passes over a roll that prestresses the wire to a curve of such a small diameter that, after the wire has been taken off the curve, a tension tending to bend the wire in the direction of bending of the reinforcement spiral remains in the wire. The winding takes place so that at the immediate proximity of the initial end of the last the wire passes over rolls. The first roll, whose projection is partly outside the projection of the mantle of the last and which gives the wire a curve radius smaller than the radius of the last, makes a tension bending in the wire in the direction of bending of the reinforcement spiral which bended remain in the wire.