To easily allow positioning to an installing position of a construction object while shortening a binding hour of a crane when installing a small beam on a large beam by hoisting the construction object fixed with a plurality of small beams like a unit floor.
A gusset plate 20 is welded to a web 16 of the large beam 16, and a guide plate 22a is welded to both sides of this gusset plate 20. The guide plate 22a is constituted so that an interval expands in a V shape in an upper end part. In the small beam 10, a lower flange 10c is cut out in a beam end part, and the unit floor 14 is suspended so that a web 10 of this cutout part is inserted into clearance between the guide plates 22a, and the small beam 10 is supported by allowing an upper flange 10b of the small beam 10 to abut on the upper end of the guide plate 22a.
TANIDA KENJI
Noritaka Harashima
Kurokawa Megumi
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