| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat insulation structure of a building, capable of suppressing the degradation of heat insulation performance while securing a strength of a unit ceiling part.SOLUTION: An upper floor unit 20B is installed above a lower floor unit 20A by setting back the upper floor unit 20B with respect to the lower floor unit 20A. Floor girders 23A arranged on the outdoor side in the upper floor unit 20B are arranged on an intermediate part of a ceiling part of the lower floor unit 20A. Reinforcing beams 31 extending along the floor girders 23A between a ceiling surface material 27 and the floor girders 23A are stretched between a pair of ceiling girders 22 facing each other in the lower floor unit 20A. The reinforcing beams 31 are arranged spaced apart downward from the floor girders 23A, and arranged spaced apart upward from the ceiling surface material 27. A part of a ceiling heat insulation material 46 is sandwiched between the reinforcing beam 31 and the floor girder 23A, and a part of a ceiling heat insulation material 45 is sandwiched between the reinforcing beam 31 and the ceiling surface material 27. |
