These racks are made entirely of steel and designed to hold heavy parts such as door panels, center consoles, liftgates, bumpers, and more. Each rack is desgined part specific to get highest part density while holding parts securely in transit. HDPE and Foam is extensively used to protect contact points. Particular attention is given to mechanisms to ensure they are user friendly and safe. Common dunnage on these types of racks includes foam, rubber, formed and machined plastic. For racks used in automation and robotic work cells, fixtures are made to tight tolerances in-house and raw materials are cut to very tight tolerances. For work-in-process, cantilever racks are a common choice.