In order to make up for the prestressed concrete concrete cracks in the phenomenon, in the use of components (load) before, to advance a concrete pre pressure in concrete in the tensile zone, using the method of artificial force, reinforced by stretching, the retraction force of steel, the tension zone of the concrete pre stress. This stored pre pressure, when the components bear the tension produced by the load when the first offset by pre stress tension zone in concrete, and with the increase of load, the concrete tension, which limits the concrete elongation, delay or not lead to cracks, which is called prestressed concrete.