The Japanese government has set up an action plan to reduce the total cost of public works construction projects from planning to execution by 10/100 or more. To help reduce construction costs and dissolve the difficulty in distinguishing atand- are type from an improve type, Nippon Steel Corporation, NKK, Kawasaki Steel Corporation, and Sumitomo Metal Corporation engaged in research and develop- Ment to widen steel sheet piles in 1995, and thereafter produced and marketed them In April 1997. This report describes how the wide steel sheet piles were developed, What their features are, and provides a summary of the performance assurance test.
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