I am in the process of remodelling a bathroom, the plan is to install a new valve and tub/shower fixtures, a new inset box along the long wall, use cement board, and cover it all up with some very nice tile with a few design touches.
So I've pulled out the old tile, greenboard, and sheetrock surrounding the tub area. Next up was to frame in the inset box, but I've found my first hidden treasure -- the vent pipe! Turns out this thing comes up through the slab (first floor bathroom) and goes up between the studs, right through the area I want to put the inset box.
I don't want to change the design, so it looks like my only other option is to reroute the pipe out of the way. I know about the rule which says that a section of the vent can only be horizontal if it is at least 6" above the flood level of the fixture it vents for. Well this is not a problem as I am putting my inset box about 13" above the lip of the tub, leaving enough room for the pipe to come up well above the 6" before the 90 degree turn.
Now it's a 1-1/2" pipe (almost 2" OD) so drilling a hole in the neighboring stud would leave pretty much nothing. This is where I have some doubts, and could use some enlightenment from those who have dealt with something like this before...
Should I cut out part of the stud & brace the remaining parts to the adjacent one (on the right) with 2 new horizontal blocks? And what about placing a new vertical section between those two horizontal ones? This is an interior wall close to the center of the house with a closet on one side and the bathroom on the other. I don't think it's bearing much load, so maybe I should I just remove the stud alltogether and stop worrying about it so much. I do need something to attach my cement board to though!
The other reason I am a bit leary about eliminating that stud is that I'm already having to cut the one to the left of the pipe as that one is close to the center of my box. Now the box itself will "connect" that stud back together, but it's not supportive like the original piece.
To help make sense of all this, I've whipped up some drawings. They aren't exactly to scale, but they are close enough. Here is the original state of things:
And here is what I'm thinking of doing (with a few optional items, see below):
I'm not sure if it is necessary to provide the supports marked A, I figure this would help with the stability of the box though.
The squiggle marked B is a support strap for the vent pipe, but I'm not really sure if this is necessary either. It's not exactly "solid mounted" as it is, so I figured it might be good to support the added weight and odd pull of the offset portion.
The stud marked C is the additional part I referred to way earlier, not sure if it would be of any help. If anything, it provides more places to anchor the cement board.
And by the magic of the interwebs....let there be replies!