ROOF STRUCTURE

PROBLEM TO BE SOLVED: To provide a roof structure which can be easily constructed under an elevated railroad or an elevated road and has fire-resistant performance.SOLUTION: An elevated structure 200 mainly comprises a plurality of bridge girders 201, beams 211 and piers 212. A roof material 140 is suspended from bottom faces 202 of either the bridge girders 201 or the beams 211 through hanging bolts 110. External walls 223 are installed from the bottom faces 202 of the bridge girders 201 to a floor slab 225. Fire-resistant walls 224 are installed from the roof material 140 to the floor slab 225. The external walls 223 and the fire-resistant walls 224 have waterproof and fire-resistant performance. A habitable room 230 is configured by the roof material 140, the external wall 223, fire-resistant walls 224 and the floor slab 225. A facility for business operation is installed inside the habitable room 230.