Moving toilet drain across joists

Discussion in 'Toilet Forum discussions' started by TRSHAWSR, Oct 24, 2007.


    TRSHAWSR New Member

    Oct 24, 2007
    Industrial Maintenance Manager
    Salem, Ohio
    I am in a remodeling project at home and have to move the toilet to the other side of the wall that the vent stack/ drain are in. I have to cross two joist to get to the new location, and would like to know how to reinforce them so as to not weeken there ability to suport the floor once the holes are made.

    I was thinking of anchoring predrilled angle iron as a bridge above the new pipe to restore its integrity, but would like someones opinion about this before I take a saw to the joists.

    If there are any other means of doing this, please let me know.
  2. frenchie

    frenchie Jack of all trades

    Dec 30, 2006
    Brooklyn, NY and Fire Island, NY
    What size joists?

    What size pipe?

    A piece of angle iron across the top won't do it: you need to reinforce above and below (the top's in compression, the bottom's in tension, and both are completely necessary.

    Maybe a set of them, above and below... depends on the size of pipe vs size of joist. Personally, I'd want an engineer to spec that sort of solution. A few hundred bucks, but I sleep better at night.

    Other, more straightforward options:

    - make the new connection lower, so that the pipe runs under the joists. Depends on what's downstairs.

    - reframe that section of the floor, the way you would for a staircase or skylight opening, with a doubled header at each end.

    - my favourite: change the design, so as to avoid the problem in the first place.
    Last edited: Oct 24, 2007
  3. Sponsor

    Sponsor Paid Advertisement

Similar Threads: Moving toilet
Forum Title Date
Toilet Forum discussions Moving toilet rough-in Sep 11, 2017
Toilet Forum discussions Wall Mounted Toilet Moving Jul 19, 2017
Toilet Forum discussions Basement Toilet Water Moving May 27, 2017
Toilet Forum discussions PICK UP STIX, A tool for moving and picking up toilets Jul 12, 2016
Toilet Forum discussions Moving toilet pipes Feb 15, 2015

Share This Page