| 摘要 |
PURPOSE: To improve workability when a ceiling structure is constructed, reduce manhours necessary to construct the ceiling structure, and maintain airtightness between the inside of the ceiling and the interior of a room. CONSTITUTION: A pair of ceiling cornices 30 are fixed to an inner wall 36. Recessed parts 32 extending in its lengthwise direction are formed on the ceiling cornices 30. I-shaped ceiling floor joists 38 are suspended in parallel to the ceiling cornices 30 by suspending tools 39, and recessed parts 40 are formed on both surfaces in the ceiling floor joists 38. The recessed parts 40 of the ceiling floor joists 38 and the recessed parts of the ceiling cornices 30 are opposed to each other. When a ceiling board 42 is removably fitted to and inserted into these recessed parts 32 and 40, a ceiling structure is formed. |
