| 摘要 |
PROBLEM TO BE SOLVED: To realize a river structure rationally and easily constructible with the ability to weaken the force of a river stream and to control the direction of the stream. SOLUTION: A frame body is built up by connecting lumber comprising a sand removing member, a first principal rafter member, a ridge member, a header member, a girder member, a first beam member, a second principal rafter member, a second beam member, a third principal rafter member and a third beam member. A weight block formed in specific shape is disposed between the respective beam members of the frame body, and each support member is passed through the weight block and connected to the girder member. COPYRIGHT: (C)2004,JPO
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