Originally Posted by
Joshua Hardesty
Jerry,
So from your description, a relieving arch will never be added after the footing is already there, it's got to be engineered into the system when it's built.
Correct.
How'bout this then: When a basement is built with a poured cement wall, and is core drilled, does that still need a sleeve?
Now you are mixing terms.
We *were* talking about going "under footings", now, though, we *are* talking about going "through foundation walls" ... and the code covers that - sleeve it with a sleeve two sizes larger.
And furthermore, I have a question about the material of said sleeve. I know its supposed to be two pipe sizes larger than the pipe itself, so if I have to run 1/2" pex through a wall, how much protection is that 1" pex really going to offer?
I don't know about using PEX as a sleeve, but, for the moment, let's say it is okay.
That PEX is simply there to make sure that the pipe does not do three things: 1) abrade or have dissimilar material contact; 2) allows for the sleeved pipe to be totally free of pressures on the foundation wall' 3) allows for expansion and contraction of the sleeved pipe.