I wanted to build an easily removable floor so could get stuff in and out of the bottom area (I have to get at least a couple hundred gallon tank for handling the pool water prior to treatment, the only way to have our desired 'infinity edge' pool with the gutters), so put in a ledger board across which I would have short sections of floor I could remove.
Below you can see the sump that is dug in a further 2.5 feet below the gravel. It does a remarkable job keeping up with the ground water (as long as it is working).
Man that is a big pool...
The walls begining to take shape, and you can clearly see my removable floor.
Sometimes we got creative on ways to move around. I found it quite stable, but Eliz wasn't so sold on it.
Working on the overhang, not quite 4 ft.
Getting the roof water tight, fortunately a tiny job.
Another shot of this huge pool...
Getting the sheating up, window in and rain barrier.