Patent ID: 7353960

Claim:
An insulated floor for a cargo container comprising: a floor panel having a longitudinal axis, a bottom surface, and a first end and a second end opposite said first end; a plurality of insulating members having a top and bottom surface, the top surface attached to the bottom surface of the floor panel; a first insulation layer comprising a top surface and a bottom surface, wherein the top surface is located on the bottom surface of the floor panel and wherein the combination of the first insulation layer and the insulating members substantially covers the bottom surface of the floor panel; a first side sill attached to said first insulation layer at the first end of the floor panel and having an interior surface; a second side sill attached to said first insulation layer at the second end of the floor panel and having an interior surface; a sill substantially centered about the floor panel and aligned along the longitudinal axis of the floor panel and having a top and bottom surface, the top surface attached to the bottom surface of at least one of the insulating members; a plurality of I-Beams aligned along the longitudinal axis of the floor panel and having a top and bottom surface, the top surface of each I-Beam being attached to the bottom surface of an insulating member; and a second insulation layer substantially covering the exposed surfaces of the center sill, the plurality of I-Beams, and the inward-facing exposed surfaces of the first side sill and the second side sill.