1. a Technical Research Institute. Mitsubishi Construction Co., Ltd. 1-297, Kitabukuro-cho. Omiya-shi, Saitama 330, Japan
2. b Tokyo Civil Engitteerittg Branch. Mitsuhishi Cortstruction Co.. Ltd.. 4-8-75, Nihonbashi-honcho, Chuo-ku, Tokyo 103, Japan
3. c Project Promotion Department, Taisei Corporation, 1-25-1. Nishi-Sinjuku. Shinjuku-ku, Tokyo 163-06, Japan
4. d Technical Division, Nihon Civic Consultant, 2-26-2, Nishi-Nippori, Arakawa-ku, Tokyo 116, Japan
5. e Advartced Technology Division, Mitsuhishi Construction Co.. Ltd., 3-3-6. Nihonbashi-honcho. Chuo-ku, Tokyo 103, Japan
6. f Technical Research Institute. Mitsubishi Construction Co., Ltd. 1-297, Kitabukuro-cho. Omiya-shi, Saitama 330, Japan