Originally Posted by
Trent Tarter
plumbing supply and drain pipes routed below the foundation footing.
is typically allowed by code or considered acceptable.
Yes, with the condition that a relieving arch be designed and built into the footing. That relieving arch transfers the loads imposed above the plumbing to the footings one each side of the plumbing, placing no load on the plumbing piping.
It is a requirement - though it is seldom done unless pointed out by someone who knows.
We had quite a discussion regarding this several months ago.
