Abstract: A prestressed steel support structure and method of erecting the same having bearing supports and containing at least one tension element having at least one hollow profile member extending in a catenary configuration between support locations and within which there is arranged at least one prestressing cable. The hollow profile member is provided with a filler and the prestressing cable forms a connection with the hollow profile member by means of such filler.

Abstract: A method of manufacturing a support framework or truss having at least one suspension element arched in one direction and serving as a roof construction, formed from concrete poured at the site or from prefabricated components, comprising forming a reinforcement construction taking-up the horizontal forces and composed of two horizontal supports arranged in spaced relationship from one another and extending transversely with respect to the arching direction of the suspension element, and which horizontal supports are laterally interconnected by means of reinforcement components, and supporting the thus formed reinforcement construction upon supports. Tension elements for the suspension element are arranged in a spatial curve extending in a catenary configuration between the horizontal supports and are anchored at the region of the supports at the reinforcement construction.

Abstract: A fence for feed lots or the like having prefabricated fence panels mounted on vertical fence post. The fence is completely portable and can be quickly constructed, torn down, moved, or added to depending on the changing conditions of enclosing animals of various sizes and numbers.