To construct a road, a walk, and a parking garage at an inexpensive execution cost by realtively simple execution work.

Beams 1 are overhung from an inclined face from an existing road. The beams 1 are fixed by rock bolts 2. An overhang part of the beams 1 is supported by columns 6 rising from the inclined face. An intermediate part of the beams 1 and a lower part of the columns 6 are connected by connecting materials 7 run along the inclined face. The connecting materials 7 can use a rust preventive processing-applied tension member and a reinforcing member by injecting grout by inserting the tension member into a sheath. Thus, a simple structure is formed by using the rock bolts 2, and lifting and supporting the columns 6 by the connecting materials 7 so that the execution cost can be restrained. A load is supported by dispersive reaction with a triangular structure of the beams, the columns, and the connecting materials.