We're doing a pool remodel and want to add a small area i the shallow end for our 1 year old to be able to stand and splash in the water. My question is in order to attach this to the preexisting pool does the floor of the pool have to actually be jack hammered to access rebar? The pool has no rounded edges they are all straight cuts so what I wanted to do was come off of the second stair (rounded radius stairs to the nearest wall the area of this shelf will be approximately 4' wide by 7' long water depth on shelf will be approximately 14" deep. Any info on attaching the block structure to this 1970 gunnite pool would be greatly appreciated