| 摘要 |
PROBLEM TO BE SOLVED: To provide plumbing in a dwelling house facility core unit installed in a building unit, particularly the piping structure of a building and the piping structure of a unit building convenient for site works such as construction and repair, capable of providing a sufficient drainage slope of pipes, preventing a step between a core unit and the floor surface of the other building unit. SOLUTION: This unit building comprises the units of stories of a multi- storied building or a plurality of building units 1, 2, etc. The drain water pipe 3 connected to dwelling house facility core units 11 and 21 is located of in the downstairs of the dwelling house facility core unit 11 on the story, and routed outdoors through a dead space 212 of the downstairs dwelling house facility core unit 21 of the dead space 212 left on the upper part.
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