Abstract: A cargo container is disclosed having a pair of parallel, spaced, longitudinally extending side rails, each of which having a sliding track formed along the longitudinal axis of the slide rails and an adjustable rail structure extending between the side rails and slidably adjustable on the tracks between an access position to permit loading and unloading of freight within the container and a variable retaining position to permit retention of the freight within the container. The adjustable rail structure includes a pair of slide members and an interconnecting retaining bar connected therebetween. Each of the slide members includes inner and outer hinged slide portions wherein the retaining bar is connected to the outer slide portions. The inner and outer slide portions pivot with respect to each other upon movement of the retaining bar between the access and storage positions.