Soil pipe and floor joists.?

Question

I have to run a soil pipe against the floor joists. Is it possible to run a soil pipe tru floor joists of 10"x2" thickness by reinforcing the remaining jiost with steel. . If so how is this safely done. I need to get tru 3 floor joists.

Answer 1

You should be able to reinforce the joist to make up for the removed material, but the exact type of reinforcement and configuration would depend on the specifics of the joist. Is it a solid piece of wood, a composit beam, or an "I" joist? Generally you should be able to reinforce with straps on both sides of the joist, spanning the opening (below the opening) and an extra 6-12 inches beyond the opening. Anchorage should be able to develop the strength of the strap.

Answer 2

that would be against building regs unless supported by calculations from a professional of a way to transfer the loads

if that needs to be done it could be put beneath the floor and concealed in a bulkhead or

use a saniflo IF you have a conventional toilet as well, you are not allowed to have the only wc as a saniflo as they take electricity to work, power cut or fault NO LOO which is bad news

Answer 3

Not safely or according to code you can't. The MAXIMUM depth of cut on a 10" solid beam from the top is 2" and it has to be square on all cut lines. Reinforcing is NOT permitted.  The maximum circle that can be placed in a 10" beam is 3" and it must be centered in the beam.

You will have to run it under the beam.

Answer 4

not read any of answers yet but i can tell you no way ..BUT they do a joist that has holes in it ...just ring up any company that sells roof trusses ...it would mean changing the joist ..best option is to fit a saniflo

Answer 5

Depending on where your supporting beams are, you can indeed cut the floor joists and 'band' them to other floor joists.

We do that when installing new floor furnaces.

If you can just notch the floor joists you would be better off. You can band the notch with a heavy steel strap. Our code allow up to a third of a joist can be notched. In your case, that would be 3 1/2 inches. It's ideal to notch the top part, but it is allowed by most codes to notch the bottom and support it with heavy strap that is well screwed or nailed into the joist.

The best thing to do is drill the joists, but most of the time you cannot easily feed the pipe through.

I suggest you draw out your floor joist design on paper and take it to a city inspector to find out what you can do.

Answer 6

Assuming your installing a new WC in a difficult location - consider a small-bore electric pumped system.