Method of prestressing concrete overhead beam

摘要

Prestressing of the concrete ceiling beam (1) is achieved by deflection of the metal element (2). Summary of the invention consists in that at least one flexurally rigid metallic member (2) bent construction, based in the manufacturing mold (4) is flexed into direct shape dotlačením two cross members (3) to the sides of the mold (4) by tightening bolts (5) . After concreting the mold (4) and the hardening concrete girders (3) is removed.