Abstract: The inventive system interconnects molded resin panels to form a secure and reliable pool wall. Each panel 10 has a facing wall 11, base flange 12, and top flange 13, and each end of facing wall 11 has vertical margins 15 approximately aligned with wall 11 and juxtaposed between adjacent panels. Each margin has an outer groove 16 and an inner groove 17 that extend for the vertical length of margin 15 and are spaced laterally and disposed obliquely to each other. Panels 10 are positioned in a predetermined orientation to each other and are joined together at their margins by vertical locking strips 20. Locking strips 20 have an H-bar shape with a cross web 21 positioned between juxtaposed margins 15 and inner span 22 and outer span 23 overlapping margins 15. Acutely in-turned ribs 14 on the vertical edges of inner and outer spans 22 and 23 engage in margin grooves 16 and 17 and secure margins 15 together.

Abstract: A pool wall is formed of resin panels 10 that are reinforced and connected end to end with inward facing walls 11 having peripheral flanges and strengthening ribs 16-19 that extend outward. End flanges 14 and 15 have longitudinal alternating projections 20 along their inner and outer edges, and the alternation of projections is reversed on opposite panel ends to form mating interlocks holding panels 10 against vertical relative movement. Projection free spaces between projections 20 form vertical channels 25 extending up end flanges 14 and 15, and holes 24 on end flanges 14 and 15 are spaced along channels 25. Horizontal channels 26 extend along the top flange 12 to join and extend between vertical channels 25. Strip-shaped lengths of reinforcing material extend along the vertical and horizontal channels, and the vertical strips lock the connected panel ends to resist transverse horizontal movement between panels 10.

Abstract: A swimming pool wall is formed of interconnected panels extending a substantial distance along the pool wall and upward for only part of the height of the wall which is formed of at least 3 tiers of panels. The panels are formed of resin material to have an inward facing wall and flanges extending outward along top, bottom, and end edges. The top and bottom flanges have mating tongues and grooves extending along the length of each of the panels to interlock the tiers together, and the flanges are connected to hold the tongues and grooves together. The flanges at the ends of the panels are interconnected and arranged so that the end joints in one of the tiers are located in central regions of panels in an adjacent tier. A strengthener is fitted into a tongue and groove relationship with the lowermost of the bottom flanges to extend across end edge joints for strengthening the bottom tier.

Abstract: The structure of forming panels and panel segments for use in assembling free form pools is disclosed. Structural relationships regarding radius of bend of the forming panels and their lengths in terms of angle of arc defined per panel permit the construction of a plurality of pool shapes, e.g. kidney, oval, figure-eight, from a minimum of panel and panel segments.