Our house is a ranch with a full basement.
The basement wall appears to me to be cast in place that is 6" or maybe 8" thick,
the beam pockets are 4.5" deep.
Above the basement slab, I measure the wall to be 7'6", so an 8 foot wall?
The beams are (3) 2x10 lumber nailed together.
Our house has a geothermal unit that pumps out of one well and dumps into
a different well in the yard on the opposite side of the house.
Pictured is the side of the basement the discharge pipe is routed through the wall.
It is my intention to convert the geothermal unit to a closed loop.
In one design of the loop, I would need to drill two new holes that are
about 1 foot above the basement slab through the concrete wall that are
3 inches in diameter.
Are there any considerations of where not to drill a hole through a
cast in place concrete basement wall, or a limit to how large a hole can be drilled?
In one of the two images I will post, I drew in two red circles where I think
I might want to have the pipes go through. MMM, it is rejecting my images.
Is there a concern for drilling (vertically) beneath the beam pocket like
previous owners had done for the discharge pipe?
... does the hole near the pocket weaken the wall for supporting the beam?