| 摘要 |
PROBLEM TO BE SOLVED: To secure space required for spacing while keeping the floor surface level of an upper floor and a ceiling surface level of a lower floor equal to the level of the other parts right above the piping space or right under it without impairing comfort of residence in taking the space between the floor of the upper floor and the ceiling of the lower floor as a piping space for a drain pipe. SOLUTION: In a ceiling structure of a building, a ceiling joist 45 formed of steel product is stretched in a part of the interior of a frame 41 of a ceiling panel 23, the height of the ceiling joist 45 is made lower than the height of a frame member (ceiling joist 42) of the other part to take the upper part of the ceiling joist 45 formed of steel product as a piping space 33. |
