| 摘要 |
PROBLEM TO BE SOLVED: To improve the fireproof performance by sticking a thin metal plate to a bed material for ceiling or wall by keeping a superposing margin, superposing a face bar on the metal plate, and fixing the face bar by driving a fixture from the face bar side. SOLUTION: A plurality of square pipe-like steel ceiling joists 1 as a bed material arranged under the roof are arranged horizontally at fixed intervals, and an adhesive or double-surfaced adhesive double coated tape 3 is applied to the steel joists 1. Strip metal plates 4 about 60 μm thick cuttable by a board knife are successively put on and adhered to the adhesive tape 3 of the steel ceiling joists 1 while keeping a superposing margin 5. A ceiling board 5 consisting of plaster board as face bar is arranged extending over the lower surfaces of the steel ceiling joists 1 in the state where it is superposed on the metal plate 4, and the ceiling board 6 is fixed to the ceiling joists 1 by screwing a vis 7 from under. Accordingly, the fireproof performance of the face bar can be improved at a low cost. |
