To join plural horizontal reinforcements to a vertical reinforcement at one time at the time of joining a horizontal reinforcement to a vertical reinforcement previously installed on a sill.

This reinforcement hanging band is formed by a belt-like band main body 21 formed of high strength fiber, and plural reinforcement fixing devices 23 provided in the longitudinal direction of the band main body 21 on the surface of the band main body 21. In use, plural reinforcement hanging bands 20 are arranged on the ground, then horizontal reinforcements are arranged thereon, and the horizontal reinforcements are fastened to the respective reinforcement hanging bands 20 through the reinforcement fixing devices 23. After that, the horizontal reinforcements are hoisted together with the reinforcement hanging bands 20, and then lowered to the position intersecting perpendicularly to the vertical reinforcement. This condition is kept. Meanwhile, the respective horizontal reinforcement bars are tied to the respective vertical reinforcement by a wire.