A lateral load-resisting system that is known but does not fit into the other definitions in this table. Other systems include tension structures, shell structures, space-structures, folded plates, tubes and other complex structural systems for very tall buildings.


National Swimming Center in Beijing, China (also known as The Cube) is a space (3-D) frame assembled from 22,000 steel tubes welded to 12,000 nodes; this is a unique structure (D. Willms)


Space truss structure, Science World, Vancouver, Canada (S. Brzev)