Patent attributes
Below grade fluid containment structures, which may include a foam floor and a foam wall extending upward from the floor, the foam wall being formed from foam panels and optionally a plurality of metal splines. A foam buttress is provided as part of or adjacent to the foam wall, for reducing pressure against an exterior face of the foam wall that would otherwise be exerted by the soil, in the absence of the foam buttress, which places a top portion of the soil at an angle of repose, to minimize inward pressure. A concrete footing can be provided below the foam wall, where the splines of the wall are vertically oriented in the foam wall, with a bottom of the splines anchored into the concrete footing. The interior surface of the pool or other structure can be coated with any desired finish coating.
