I've tried looking at every possible height, on flat ground, noclipping up, down, left right and sideways. Turned off noclip. 90% of the time my building pastes all the way under the map, rgardless of what I do. Every so often, I get like, the top 3rd above the ground. I've tried autoheight on and off. I get the whole building, with all the right deployables, auths etc. It's just under the map. I know I must be doing something wrong but I don't even know what to search for to try to find an answer. My searches didn't bring anything up.

Other people say it is related to a triangle foundation below the TC.

Ahh. I'll try another build on squares. Thanks!

it is not connected with TC, if you put one triangular foundation and push it in, it will go to the water