| 摘要 |
PROBLEM TO BE SOLVED: To provide a free-gradient gutter eliminating a rattle noise caused by cover latching, by having a gate-shaped structure in which a pile cap having rainwater flow ports opened at regular intervals throughout extension and side walls are structurally integrated together.SOLUTION: After invert concrete (2) is poured in accordance with a drainage slope, a gate-shaped gutter body (1) adapted to the height of a road surface gradient by screwing an up-down adjustment screw (8) into an insert nut (12) provided in a bottom surface (11) of a side wall is placed on the invert concrete (2), and adjusting concrete (10) is poured for construction of a free-gradient gutter. |
