Abstract: The invention relates to an alignment and/or tracking device (1) for solar collectors (x), comprising a plurality of pivot axles (S) on each of which a plurality of solar collectors (5, 5?) are mounted, and a jointly acting adjustment device (6, 7, 8) which couples the pivot axles (S) to one another in such a way that the pivot axles (S) are jointly pivotable. The alignment and/or tracking device according to the invention is characterised in that the adjustment device (6, 7, 8) is coupled to each of the pivot axles (S) by at least one articulation joint (GL), in particular a universal joint.

Abstract: A method for producing a screw foundation (1) for anchoring building parts or structures in the ground, comprising the following steps: providing a tubular starting material (10) with a required length, laying a free end (12) of the tubular starting material (10) between at least two shaped elements (20), securing the tubular starting material (10) in its longitudinal direction, compressing the free end (12) of the tubular starting material (10) by moving together the at least two shaped elements (20), with the result that an at least partially tapering region (14) is formed on the free end (12) of the tubular starting material (10), and forming a screw-like or helical thread (16) on the at least partially tapering region (14).