1964Bridges, Dams, Tunnels, and Plants

Benda Kogyo developed the cold-bending processing method for H-steels that are used in 80% of all dams in Japan. In 1973, we were granted a patent for an “method of cold-bending H-steels” that is used to manufacture H-steels to reinforce the doors when opening and closing a dam’s sluice gate. In 1974, we were granted a patent for a “method of bending steel pipes at small radius by cold processing”. This technology is used for infrastructure throughout Japan, such as dams, tunnels, bridges, and revolving restaurants on the top floors of hotels, as the economy experiences a high level of growth.