not to hijack the thread, but we are also under construction, and I failed to figure out ahead of time what water depth our shelf would be (we are wherever the architect and pool builder defaulted to). The shelf is formed with rebar on the outside, with some untouched soil they excavated around inside, and we are already rebar-ed, so it is what it is. Concrete will be shot this coming Wednesday. It is built per plans which call for the top of the shelf to be "9 inches below beam". What exactly is "beam"? I read it is the top part of the concrete wall, where the coping will sit, where the waterline tile goes. If this is correct, this would mean that the shelf would be roughly 9 inches deep (from water line). Do I understand this correctly?
