| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to increase an effective story height and thereby to reduce the building cost and running cost. SOLUTION: Under ceiling structure 1, a ceiling receiving member 4a is connected to the lower end of a hang bolt 3 hanging from an upper floor step 2. The ceiling receiving member 4a, whose bottom is open, is formed substantially like a box where the inside area is used as a housing recessed area 5. A plurality of slim type high functional fluorescent tubes (high frequency exclusive lamp) are incorporated thereinto one by one in the longitudinal direction. Both sided edges 10a and 10b of an air filter 10 for air cleaning, which serves as a ceiling panel, are placed on the top on both sided edges of an upper board 4c of the ceiling receiving member 4a by way of an airtight gasket 11. |
