Not a problem with stacking them for storage, I have a "side yard" not
show in the pic that runs the length of the house.

My concern with this approach would be... will building code allow it?
I guess only my local town would anser that. But lets say they did...

I was thinking 2x12's topped off with either plywood, or deck
boards... each section would need to be about 3 feet wide (for weight
purposes), and 18 or so feet across the pool. The pool is 16ft x 32ft.
Question, can you even span 18 feet with PTL 2x12's, can you even get
them at 18 feet? Would my pool structure even support all the weight
on it?

Does any of this seem feasible, or am I just crazy?