Abstract: A trommel screen machine including at least one revolving screening drum, at least one drive for the screening drum, a feeding hopper as well as at least one collecting device, such as a transport device, for collecting and transporting the screened good. In front of and/or on the trommel screen machine at least one disc screen is arranged which screens a defined grain, in particular oversized particles.

Abstract: A structure, such as for a full-size stadium roof, which has a retractable central portion capable of opening up about one-half of the total roof area. Two retractable roof panels, rectangular in plan, cover an area that can be larger than a football field, and move in the direction of the main axis of the stadium.

Abstract: A cable dome has lower and upper outer cables each connecting nodes of an edge ring which are spaced by two other nodes. The lower and upper cables connecting the same nodes are spaced from each other in elevation by a pair of outer struts each having an upper and a lower node. Each upper node in turn supports lower and upper inner cables, serving a function similar to that of a corresponding edge ring node.

Abstract: A structure, such as for a full-size stadium roof, which has a retractable central portion capable of opening up about one-half of the total roof area. Two retractable roof panels, rectangular in plan, cover an area that can be larger than a football field, and move in the direction of the main axis of the stadium.

Abstract: Disclosed is a shelter structure using a saddle-shaped cable dome system for a large-span, lightweight roof membrane. The structure uses the curvatures of a saddle surface, combined with two orthogonal cable nets separated by a set of compression struts, to create an efficient structural system confined by an edge ring loaded primarily in compression.