Abstract: A concrete screed rail having generally parallel spaced top and bottom edges, at least the upper one of which is provided with a finished surface, there being at least one and preferably a plurality of recesses in a web portion of the rail. The recesses in the web portion preferably are closed off by a thin layer of concrete, the concrete including that of said recess being reinforced by a mesh or plurality of short fibers. The screed rail may be in the form of a straight beam of I-section or alternatively of generally L-shaped cross-section. If desired, additional reinforcement may be incorporated in the rail.