To conduct operation, in which reinforcements are assembled, easily and efficiently in a vertical pit excavated at a mountainous region and other narrow places, where a large-sized truck cannot be used.

A fixed number of reinforcement fixtures 11 are installed to a reinforcement suspending frame 1 horizontally suspended by a crane 9 at regular intervals, and stoppers 17 for arranging the suspending height of reinforcements for vertical reinforcements by abutting the upper ends 15a of the reinforcements 15 of the vertical reinforcements against each reinforcement fixture are projected. Reinforcement fixing means 19 fixing the upper end sections 15A of the reinforcements for the vertical reinforcements are mounted.