PURPOSE: To shorten the term of works by projecting U-shaped anchor reinforcements continuing to upper and lower girder main reinforcements at the post connecting end sections of a PC girder and using a wire rope as a hoop encircling the post main reinforcement of the PC girder connecting section of a concrete post.

CONSTITUTION: U-shaped anchor reinforcements 9 continuing to upper and lower girder main reinforcements 6, 7 are projected at the post connecting end faces of PC girders 1 in the three directions as underground girders. The two faced PC girders 1A, 1B are suspended horizontally onto a base 3a as a foundation so that the anchor reinforcements 9 are positioned among the post main reinforcements 4 of pilasters 2. Hoop reinforcements 5 consisting of wire ropes are stretched under the state, in which the hoop reinforcements are wound around the post main reinforcements 4. The split band reinforcements 2 are mounted around the post main reinforcements 4. Forms are arranged, and concrete is placed to the pilasters 2 and the residual section of the foundation.