Patent ID: 7946087
Filing Date: 2011-05-24
Classification: E04D,E04F

Abstract:
1. A sump box for a roof drain which comprises; a plurality of horizontally oriented flat plate portions overlapping each other having a central opening therebetween, with the flat plate portions defining a peripheral flange around said opening, with the central opening having a width less than a distance between building roof joists, with the peripheral flange providing attachment of the sump box to a building flat roof, a plurality of downwardly facing angular transition portions overlapping each other, integral with said peripheral flange contiguous with said central opening, a plurality of vertically oriented downwardly depending steps integral with said angular transition portion portions, and a plurality of horizontally oriented flat sump deck portions integral with said downwardly depending step portions, said sump deck portions having a roof drain interface opening adaptable to receive a roof drain with the sump deck portions coplanar with said peripheral flange, said sump deck portions positioned sufficiently below the flat plate portions permitting water to flow uninhibited into the roof drain, wherein said sump deck portions are positioned below said peripheral flange at least 2.00 inches (5.08 centimeters), wherein said each sump box is made from a material selected from the group consisting of steel sheet metal, galvanized steel sheet metal, stainless steel sheet metal, aluminum, copper, lead, and brass, with a thickness of at least 0.048 inches (0.31 centimeters) or 24 gauge, wherein said overlapping junctures are attached together with a plurality of spot welds and a plurality of solder joints at said junctures providing a water tight sump box.