hans_idle
New Member
I did a search and found quite a bit of information about boring holes in studs (including the Joist/Stud boring guide PDF), but I'm looking for a little more info.
I have 2 sinks in my master bath against an outside wall. The ABS drain pipe comes up the wall to the left of the left-hand sink, then through a stud and then a "T" connector. The one end of the "T" connection comes through the wall for the left-hand sink, and the other end goes through the next 3 studs, then a 90degree elbow through the wall for the right-hand sink.
So, if I counted correctly, the ABS drain line goes through 4 studs. It is 1.5" ABS, and the studs are 2x4. The hole must be about 2". I see stud shoes on the 2x4s that were bored. Now, according to the Joist Boring guide, you're not supposed to go through more than 2 consecutive studs when boring 60% (2" in a 2x4 is 57%). In my case, it appears that there are 4 consecutive joists that are bored 57% with stud shoes.
My problem is that with the new bath layout, if I were to continue the same design, I'd need to go through a 5th stud since I'm widening the space for the sinks.
My question is whether or not you can go more than 2 consecutive studs at 57% boring as long as stud shoes are used, or if it's not allowed even with the shoes.
If it's not allowed, I suppose I'll have to run the drain for the right-hand sink down the wall and then bore through the floor joists (2x10) which seems like it would be okay due to joist size. I'd bore over to the nearest drain line which is 4 or 5 joists away and then tap into it with a "T".
Any other options is the stud shoes don't eliminate the 2-consecutive stud rule?
Thanks!
-Hans
I have 2 sinks in my master bath against an outside wall. The ABS drain pipe comes up the wall to the left of the left-hand sink, then through a stud and then a "T" connector. The one end of the "T" connection comes through the wall for the left-hand sink, and the other end goes through the next 3 studs, then a 90degree elbow through the wall for the right-hand sink.
So, if I counted correctly, the ABS drain line goes through 4 studs. It is 1.5" ABS, and the studs are 2x4. The hole must be about 2". I see stud shoes on the 2x4s that were bored. Now, according to the Joist Boring guide, you're not supposed to go through more than 2 consecutive studs when boring 60% (2" in a 2x4 is 57%). In my case, it appears that there are 4 consecutive joists that are bored 57% with stud shoes.
My problem is that with the new bath layout, if I were to continue the same design, I'd need to go through a 5th stud since I'm widening the space for the sinks.
My question is whether or not you can go more than 2 consecutive studs at 57% boring as long as stud shoes are used, or if it's not allowed even with the shoes.
If it's not allowed, I suppose I'll have to run the drain for the right-hand sink down the wall and then bore through the floor joists (2x10) which seems like it would be okay due to joist size. I'd bore over to the nearest drain line which is 4 or 5 joists away and then tap into it with a "T".
Any other options is the stud shoes don't eliminate the 2-consecutive stud rule?
Thanks!
-Hans