BUILT-UP TYPE MAN-MADE FISH-GATHERING STRUCTURE

摘要

PURPOSE:To promptly and simply build up a man-made fish-gathering structures of a large size and high strength, comprising the upper and lower sections by using a plurality of polygonal unit pieces and firmly fix them on the sea bottom. CONSTITUTION:A polygonal base is formed using aggregate bar-joining plates and aggregate bars of prescribed length and the top is made by using the joining plates and the bars of prescribed length on the base. Simultaneously, a plurality of triangles are connected alternately on the upper side and on the lower side to form polygonal fish-gathering rooms inside. Further, on the lower side, a plurality of polygonal structures are flatly connected to form a ring, while on the upper side, one polygonal structure is placed almost on the center of the ring of the plurality of polygonal structures connected on a plane to fix them.