Tub P-Trap in 6" floor joist?

[Bogucki]

Is there any possible way to fit a tub drain and p-trap into a 6" (5.5") floor joist?

This bath is on a second floor and the joists are only 5.5"s deep. I'd rather not have to fir down the ceiling in order to fit the plumbing in. I measured a 1.5" p-trap and it was 6" deep just by itself.

I guess my other option is to elevate the tub, which would probably be easier.

Is there any solution to this that I'm overlooking?

 

[phishfood]

If you use an above floor rough bathtub, and a street sanitary tee, that should put the hub of the Ptrap up into the subfloor.

 

[Bogucki]

So like this? The main drain is actually back behind the tub, so it will span the distance of the floor joist.

I can use 1.5" for this right? Or do I have to use 2"?

 

[johnjh2o]

1 1/2 is all you need. But use a glued trap in place of the slip joint trap.

 

[Bogucki]

Thanks John, will do. Just copied and pasted that one, but yes I will use a glued trap.