Swimming pool

Claim 1

A SWIMMING POOL CONSTRUCTION COMPRISING A WALL ENCLOSURE, A FLOOR OF GRANULAR MATERIAL, A FIRST PORTION OF SAID FLOOR BEING FLAT AND AT A RELATIVELY SHALLOW DEPTH, A SECOND PORTION OF SAID FLOOR BEING GENERALLY FUNNELSHAPED AND EXTENDING DOWNWARDLY FROM THE LEVEL OF SAID FIRST PORTION, SAID SECOND PORTION INCLUDING A LEDGE AT THE SAME LEVEL AS SAID FIRST PORTION OF THE FLOOR AND EXTENDING AROUND THE PERIPHERY OF SAID SECOND PORTION ADJACENT TO SAID WALL ENCLOSURE, A TRANSVERSE BEAM EXTENDING ACROSS SAID FLOOR BETWEEN SAID SHALLOW FIRST PORTION AND SAID SECOND PORTION, THE ENDS OF SAID TRANSVERSE BEAM BEING SECURED TO OPPOSED SIDE WALLS OF SAID WALL ENCLOSURE, THE TOP SURFACE OF SAID TRANSVERSE BEAM BEING LEVEL WITH THE SURFACE OF THE LEVEL FIRST PORTION OF SAID FLOOR, SAID LEDGE INCLUDING A PLURALITY OF INTERCONNECTED LEDGE BEAMS SPACED FROM AND COEXTENSIVE WITH THE WALLS OF THE POOL WHICH SURROUND SAID LEDGE, THE TOP SURFACE OF SAID LEDGE BEAMS LYING AT THE SAME LEVEL AS THE TOP SURFACE OF SAID TRANSVERSE BEAM, A PLURALITY OF SLOPING BEAMS SECURED TO SAID TRANSVERSE BEAM AND TO SAID LEDGE BEAMS AND EXTENDING DOWNWARDLY TOWARD THE CENTER OF SAID DEEPER PORTION OF THE FLOOR WHERE THEY ARE SECURED IN PLACE, THE TRANSVERSE BEAM, LEDGE BEAMS AND SLOPING BEAMS RESTING ON A SUPPORTING EARTH SURFACE AND FORMING THEREWITH A PLURALITY OF OPEN END COMPARTMENTS, ALL OF SAID COMPARTMENTS BEING FILLED WITH SAID GRANULAR MATERIAL, THE UPPER SURFACE OF SAID GRANULAR MATERIAL BEING FLAT AND AT THE SAME LEVEL AS THE TOP SURFACES OF SAID BEAMS FORMING SAID COMPARTMENTS, AND A FLEXIBLE PLASTIC LINER SHEET BEING IN CONTINUOUS COEXTENSIVE CONTACT WITH THE UPPER SURFACE OF SAID GRANULAR MATERIAL AND THE TOP SURFACES OF SAID BEAMS AND COVERING THE INNER SURFACE OF SAID WALL ENCLOSURE.