Disclosed is a collapsible rack assembly for pickup trucks to aid in the storage and transportation of material that is greater than the length of the pickup truck's rear cargo area bed. A base frame, being primarily hollow, tubular, and rectangular in shape, is mounted to the pickup truck's rear cargo area bed. Legs are hingedly attached at each inside corner of the base frame to support a crossbeam assembly to which ladders and other long loads may be attached thereto. The entire rack assembly may be collapsed into a single layer to minimize the amount of space the rack assembly occupies in the pickup truck's rear cargo area bed.