To provide an execution method of an inside corner of a gutter for a pit and a form for chamfering used for the execution method of the inside corner which have excellent execution performance of the gutter, which can reduce execution costs, which make possible easy manufacturing of a gutter lid to be used and a lid-holding frame for an inside corner, and which can reduce manufacturing costs.
The form 1 for chamfering is provided with two side faces 2, 2 which are orthogonal to each other and a side face 3 for chamfering on the side peripheral surface, which has a predetermined height, and which are formed in a nearly right-angled isosceles triangle prism shape. Then concrete P is poured in the outside of a concrete form K in a state that the form 1 for chamfering is retained in the outside lower position of the inside corners A, B of the corner part or the branching point part of the concrete form K attached in a gutter shape. Thus, the upper parts of the inside corners A, B of the gutter 8 can be formed in a right angle shape by the consolidated concrete P, and a chamfering part 9 is provided in the lower positions of the inside corners A, B. The chamfering part 9 is depressed in a nearly right-angled isosceles triangle prism shape in agreement with the shape of the form 1 for chamfering.
| JPS6113644Y2 | 1986-04-26 | |||
| JP3014636B |
Yasutoshi Iwata
Yu Yamamoto