Obstacles? Nah.
Believe it or not this is a basement modification add on feature adapted from a basement design for my former train cave. I got this idea from John Armstrong when he was considering a large buried pipe jutting out from a corner in his basement under ground to serve two levels of staging.
My situation at the time was a stand alone building needing two levels for passenger tracks at a 42" high and 55" high level. Five tracks on each level held a lot of cars.
I was all ready kissing the max allowable square footage but the code inspector allowed this because I still was 1 sq. ft shy of the limit.
A concrete filled 8" Sono tube buried below frost line held the far end.
<--Thinking outside of the box
