| 摘要 |
PROBLEM TO BE SOLVED: To provide a boundary block having an indicating function capable of being easily assembled in a site in the boundary block installed on a shoulder. SOLUTION: A boundary block is formed in an approximately cuboid shape, it includes a rectangular upper surface 22 extended approximately horizontally, a vertically depressed recess 30 is provided in the upper surface 22, and a female screw is formed inside of an insert 34 buried nearly vertically in the recess 30. This instruction unit 50 can be fixed by screwing a bearing section 70 in the insert 34 buried in the boundary block 20. Accordingly, it can be easily mounted in a site of an ordinary civil engineering, and a boundary block 10 having an indicating function can be executed without using adhesive of epoxy resin, etc. In the case the instruction unit 50 is screwed into the recess 30, since the direction can be freely adjusted, the fire adjustment of the angle of a reflection board can be also facilitated. |
