UNDERFLOOR STRUCTURE FOR MULTIPLE DWELLING HOUSE

摘要

PROBLEM TO BE SOLVED: To provide underfloor structure allowing stepped structure to be easily disposed in the underfloor structure for a multiple dwelling house partitioned into a plurality of stories by floor slabs each composed of a base floor slab and a displacement floor slab disposed being vertically displaced from the base floor slab to provide the floor slab with step difference. SOLUTION: The base floor slab and the displacement floor slab are connected by a fill-up concrete block. The fill-up concrete block is provided with a hollow part. Further, an optical fiber is disposed in the hollow part so as to be able to irradiate light from the optical fiber.