The zoom feature on that photo is incredible.
Somewhere up the thread, someone said there was no rebar in the concrete.
There obviously was.
I made that comment. These are the first images where I could see it. There only seems to be some to tie the bottom to the side walls and by today’s standards it is too small and not enough. Maybe I an missing it but I still don’t see any tying the floor to itself in a linear fashion.