Raised access floor system

A raised access floor system, comprising, in combination, a pan of galvanized steel, a high density chip board core material placed inside said pan, the sides of both said pan and said core material both flaring upwardly outward with said pan flaring greater than said core material, thus forming an upwardly flaring space therebetween, a PVC impact molding resting upon an upper edge of said pan and upon an upper edge of said core material, said PVC impact molding forming a frame around a central opening, an inner edge of said molding including an inwardly extending flange and an angularly inclined side wall to form an acute corner, a galvanized steel sheet in said central opening resting on said flange, and a carpet placed upon said galvanized sheet, the edges of said carpet extending into said acute corner along said inner edge of said PVC impact molding, and a downward extending fin integral with an underside of said PVC impact molding extending into said space between said pan and the sides of said core material, said fin being downwardly tapered in thickness and outwardly bowed, so a mid-portion thereof abuts with said pan side while a lower edge thereof abuts with said core material, said core material having a density between 44 and 47 pounds per cubic foot, and said raised access floor panel including a substructure for support thereof elevated above a building floor.