plumbing clearance


Old 12-18-13, 09:15 AM
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plumbing clearance

Wife and I are talking about having a 24' tall metal building installed on a rural property. We'd like the bottom to be used as a shop/storage area and top for a living space. Without changing the layout, how much clearance is needed under the floor if the septic is on the opposite side of the floor?

Building will be 60x30, living space in layout, 50x30.

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Old 12-18-13, 11:05 AM
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You have plumbing on two sides of the building and said the septic is on the opposite side so it's hard to tell how far it needs to run. Figure about 1/4" fall per foot that the drain line must run but 1/8" is also allowed for 4" lines.

Generally the toilets are the limiting factor. Also take into consideration how the large drain line must be run. It can go between the floor joists if traveling parallel with them but generally must pass beneath the joists when traveling perpendicular unless you have scissor trusses or some other means is provided to allow the cutting of your floor joists.
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