Historical
IAPMO IGC 158-2000 (R2013)
Fiberglass Reinforced Plastic Pool Shells
This interim guide criterion applies to FRP pool shells whose bottom is fully supported by soil or the structural system of the building in which it is to be installed. The sides of these types of pool shell are designed to span from the bottom to an FRP bond beam positioned around the perimeter at the top of the pool shell.
International Association of Plumbing and Mechanical Officials [iapmo]