| 摘要 |
PROBLEM TO BE SOLVED: To provide a ceiling structure which can prevent the ceiling material and the ceiling backing from falling to a floor surface at low cost even when the ceiling material and the ceiling backing are subjected to action of horizontal force or vertical force or are degraded or damaged.SOLUTION: A ceiling structure 1 includes lightweight steel frame backing 10 provided in a ceiling cavity space, and plate-shaped ceiling boards 20 attached to the lightweight steel frame backing 10. The lightweight steel frame backing 10 includes: a plurality of suspension bolts 11 supported in a suspended manner from an upper structure 40 in the ceiling cavity; a plurality of ceiling joist receivers 12 supported by the suspension bolts 11 and extending approximately horizontal and approximately parallel to each other; ceiling joists 13 supported by the ceiling joist receivers 12 and extending approximately orthogonal to the ceiling joist receivers 12, and also extending approximately horizontal and approximately parallel to each other. Further, sheets 33 are provided, each of which extends downward from the ceiling joist 13 through a gap between the plurality of ceiling boards 20 and attached to the lower surfaces of the ceiling boards 20.SELECTED DRAWING: Figure 3 |
