The reuse system mentioned in this paper is and overall system for realizing a reuse business in a series of cyclic process in a reuse flow, namely, design, fabrication, construction, maintenance, demolition, and storage. Here, we show the change of development of Rolled H-section steels. It is easy to handle them as reusable members because rolled H-section steels are manufactured in accordance with Japanese Industrial Standard. These members are stocked in building steel structures since they are produced in 1961 by steel manufacturing. Kinds and quantity of them are investigated and evaluated for adaptable for reusable members.
