| 摘要 |
PROBLEM TO BE SOLVED: To reduce the height dimension of a lower space of a double floor, and to increase the ceiling height or reduce the story height of each dwelling unit.SOLUTION: In an apartment house, a vertical drain pipe Pis arranged in a position adjacent to an entrance hard-packed concrete floor part 2. Accordingly, a distance from the vertical drain pipe Pto each water-required appliance (for example, toilet 11, bath room 12, etc.) can be shortened and a drainage horizontal pipe Pcan be shortened in comparison with the case of the vertical drain pipe Parranged in a common corridor 5. As a result, the height dimension of a lower space of a double floor (that is, the dimension of a space for ensuring a gradient for drainage in the drainage horizontal pipe Pcan be reduced, the ceiling height of each dwelling unit can be increased, or the story height of each dwelling unit can be reduced. Meanwhile, a vertical drain pipe P1 is excellent in maintainability since the entrance hard-packed concrete floor part 2 can be used as a workspace when performing maintenance work for the vertical drain pipe P1. |
