Abstract: The sidewall of a swimming pool is made up of bendable sheet modules fastened together at their ends. One end of each module is bent outwardly to define a vertical flange, the other end being unbent. A step is provided in the flanged end of each module of a depth to receive the unbent end of an adjacent module in coplanar relation to the unstepped area. Headed fasteners secure the modules together, their heads being housed in nested recesses in the overlapping portions of the modules to provide a smooth and continuous inner surface for the wall, the nested recesses serving to transmit forces from one module to the next without placing shear stresses on the headed fasteners.

Abstract: A swimming pool wall, for placement in an excavation, is made up of a series of bendable plates having only vertical flanges for stiffening while permitting shaping the wall to a selected outline. A resilient coping strip embraces the upper edge of the wall and houses a rigid metal bar to retain the upper edge of the wall in the desired configuration while other braces, at the lower edge of the wall extend from the plates to the outer edge portions of the flanges to securely maintain the lower edge of the wall in the desired configuration. Vertical Z-shaped bars are secured to certain of the plates to further stiffen them and further braces, secured to the flanges, extend diagonally upward into a concrete apron, selected ones of the diagonal braces carrying a form plate for defining the outer edge of the apron. Rigid bars are used to hold corner plates to a desired curvature during assembly of the pool wall and its placement in the excavation. After back-filling and forming the apron, those bars are removed.

Abstract: A swimming pool has a sidewall and a flexible liner, the sidewall defining an outwardly extending bay having opposed sidewalls between which a stair assembly is sealingly secured. The stair assembly is a molded structure having a continuous depending flange at the ends of the treads and risers and a hollow triangular stiffening rib extending longitudinally and generally centrally along the underside of each tread. A continuous coping embraces the upper edge of the pool sidewall, the upper edges of the opposed sidewalls and the upper edge of the top riser of the stair assembly. The opposed sidewalls of the bay are metal plates to which the depending flanges of the stair assembly are secured and those plates have edge flanges sealed to the edges of the flexible liner at the sides of the bay.