RC beams are horizontal, load-bearing elements which purpose is to accept the load of inter-oor structure, or load from roof if they are part of roof structure. Beams rely on short elements of the column or on the top of the column, depending on design. Both elements have precisely positioned in-built steel plates which provide more precise and secure mounting and connection of elements. Mounting beams may be ”L” or “T” cross section shape, depending of their position in the construction, and they carry “TT” oor slabs, with their lower part –“ tooth”. After placement of the “TT” oor slabs into a projected position, a monolithization layer is added to provide a minimum 10 cm thickness above beams. Dimensions are determined according to static calculation. Beams are produced in smooth steel formwork.