| 摘要 |
PROBLEM TO BE SOLVED: To provide a system ceiling in which ceiling boards 10 and ceiling facility equipment are placed on a ceiling substrate formed by assembling, in a lattice form, bar members 6 suspended from a ceiling slab 1 to support them, the system ceiling that makes the sagging (deformation) in the center of the ceiling board 10 inconspicuous.SOLUTION: Granular painting including particles 13 having an average particle diameter of a coating film thickness (t) of a decorative coating film 12 or more and 1 mm or less, is applied to an indoor side surface of the ceiling board 10. Even if a central part M of the ceiling board 10 sags, a shadow is made by light incident on granular parts 14 composed of the particles 13 projected from the coating film 12 in its peripheral edge part C to generate a shadow over the whole ceiling board 10, so that the whole ceiling board 10 is made apparently uniformly visible to make the sagging (deformation) of the central part of the ceiling board 10 inconspicuous. |
