My pool is AG with a combination of wood, steel, aluminum and plastic. The supports and struts are all treated 4x4s with 2x4 reinforcement. They support four steel trusses that form the frame and support the deck of the pool. The long trusses are nearly 900# each. The walls are aluminum and plastic. I am opening my tenth season with this pool and the wood shows no sign of wear. The quarter-inch thick U-channel the 4x4s stand in took some serious maintenance last season. The aluminum and plastic water walls, guaranteed for life, is not holding up too well but is still ok. That is my experience.
Carl
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