Abstract: A concrete slab is provided with prestressing cables to be post-tensioned upon setting of the concrete. The post-tensioning cables or strands are equally spaced on predetermined centers and are angled with respect to the longitudinal axis of the slab. All of the strands are parallel and are substantially co-planar with all other strands. The angle between the longitudinal axis of the slab and the strands ranges from approximately 2.degree. to approximately 60.degree..This application is a continuation-in-part application of an application entitled "PRESTRESSED CONCRETE ROADWAY", filed July 12, 1977, assigned Ser. No. 814,993, and describing an invention made by the present inventor now abandoned.