Although flat rack containers are primarily meant for overwidth (width greater than 2.35m or 7’8”) and heavyweight cargo, both overwidth and overheight cargo can be loaded on flat rack containers due to its open construction. The specially reinforced bottom construction can sustain the high pressure of heavyweight cargo. Numerous high load capacity lashing rings are installed on the corner posts, top-side rails and bottom-side rails for lashing and bracing of the cargo.