FISH NEST BLOCK AND BULKHEAD WITH FISH NEST AND FALLING WORK

摘要

PURPOSE:To make it possible to construct a stair-like bulkhead with a small offset pitch without lowering the height of one fish nest block and facilitate going up and down when walking on a channel. CONSTITUTION:A fish nest block 1 is provided with a vertical wall 2 on the rear side in both directions where a slope 3 is formed on the top of the vertical wall on either side. An upper step 4 is formed in one piece on the upper part of the vertical wall 2 in the central part. The upper step has the top as high as the vertical wall 2. A lower step 6, which is divided into two sections on either side, is formed in one piece under the front of the upper step 4. The height of the L-shaped top of the lower step is one/half the height of the vertical wall. A fish nest space 7 is formed between the vertical wall 2 and the lower step 6 while a runaway 8 is formed between the lower step 8 and the vertical wall.