A flat rack container is a minimalist specialized container consisting solely of a floor and foldable side frames, leaving the top and sides completely open. It is designed for heavy, extra-wide, and irregularly shaped cargo, such as large machinery, steel structures, and boilers. Cargo can be hoisted directly onto the floor or, leveraging its 'flatbed' nature, rolled on, rolled off, or rolled in. Because it has no side walls, cargo can be overhung, but professional and secure lashing is required to ensure safe transportation.