PURPOSE: To efficiently manufacture shapes steel for continuos wall by finish forming the flange parts of an intermediate rolled stock with a H-shaped cross- section into female joint parts with plural required cross-sectional dimensions and lengths.

CONSTITUTION: The flange parts of the intermediate rolled stock with the approximately H-shaped cross-section are finishing formed into the female joint parts 18a, 18b with plural required cross-sectional dimensions and lengths by grooved roll having plural cross-sections in the circumferential direction of upper and lower horizontal rolls 23a, 23b of a finishing mill F. Thus, in the existing line of universal rolling device for H-shape steel, the cross-sections of the female joint of shapes for continuous wall can be continuously in the longitudinal direction rolled into plural desired cross-sectional shapes which are suitable for the purpose that they are used for combined structure of concrete and a high-quality product having the stable shape of joint and excellent workability can be efficiently manufactured as compared with the working method such as welding and gas cutting.