This brings up a question - we've designed a number of pools over the years based on various books and solid engineering talent. However, we seem to be facing a condition (in the midwest USA) where pool "builders" show up and want to down-size our designs.
We design for a number of load conditions, including empty pool, full pool, partial full pool...all with and without a high water table around the tank. In most cases, we end up with a very good design, I think, and one that allows the owner the ability to drain the pool under most conditions.
But these pool builders claim that we overdesign our tanks - they use an 8" or 6" thick wall, reinforced with a single layer of reinforcing. We cannot get these sections to work with our own calcs. They claim that they've never had any problems. - But I suspect they do ...just don't advertise the cracking that results and they assume that the pool is always full so there is no real differential loading on the walls.
Any thoughts?