Abstract: A swimming pool having a panel composed in its entirety of a single unit of plastic and having an upright relatively thin wall an inner surface of which is directed toward the interior of the pool and an outer surface of which is directed away from the interior of the pool, this wall having at an upper region a stepped portion defining a recess extending along the upper region of the wall and directed toward the interior of the pool with the outer surface being stepped as well as the inner surface, and with this stepped portion being situated directly beneath a coping portion formed by a part of the wall which is curved first inwardly towrd the interior of the pool and then upwardly and outwardly away from the pool to form a coping portion which has a hollow inner interior part situated over the recess formed by the stepped portion.

Abstract: A swimming pool includes an elongated plastic extrusion of channel-shaped configuration forming a gutter for receiving liquid which overflows from the pool. This gutter has an outer upper region connected with a concrete-retaining structure.

Abstract: An above-ground pool has a pool wall made up of a series of upright, adjoining wall panels situated in end-to-end relation along an endless path so that the panels surround a given space in which water for the pool may be located. A plurality of upright rods are situated between the adjoining panels. Each panel has opposed upright end edge regions, and at each end edge region each panel has a plurality of substantially rigid fastener portions distributed along each end edge region. These fastener portions include inner fastener portions and outer fastener portions which alternate in elevation with the inner fastener portions along each end edge region of each panel.

Abstract: A swimming pool which has a plastic liner sheet having an inner surface directed toward the interior of the pool to define the interior thereof and an outer surface directed away from the interior of the pool. A plastic backing structure which is rigid engages the outer surface of the liner sheet so as to form a backing for the latter. The plastic backing structure takes the form of a plurality of units situated one next to the other along the periphery of the pool with each of these units being composed of a series of extrusions situated one next to the other. Each of the extrusions is hollow and has front and rear parallel walls interconnected by strips which are situated one above the other between these walls.