Steel reinforcement is usually developed in order to meet the needs of society, the strengthening method of many, in theory, there are many descriptions. Intensive demands on has excellent corrosion resistance of stainless steel is no exception. Steel reinforcement can make thick - thin, lightweight structure, life can also be improved. The building standards law was modified in June 2000 requiring stainless steel can be used for steel structure. JIS c 4,321 building structures made of stainless steel material used as a general structure has been authorized. Today, because the environment is very harsh and used energy saving and environmental protection, and many other issues, requiring stainless steel to high level of intensity and diversity.