Cold rolled ribbed steel bar is made of hot rolled wire rod by
multichannel cold-rolled, reducing a rib and the elimination of
internal stress after the formation of a steel bar with two or
three surface crescent. Cold rolled ribbed steel bar in priestesses
concrete members, is the upgrading production of cold drawn low
carbon steel wire, in cast-in-situ concrete structure, can be
substitution Ⅰ reinforcement, in order to save steel, is better one
in the same kind of cold rolled steel.