Rhino Van Roof Racks and van roof bars from Carbox. Rhino heavy duty van roof bars are fully welded roof racks and are designed for today's professional tradesman. For the small vans we recommend the Rhino 3-bar OCE van roof bar system to take the 8x4 boards. New for 2007 is the Rhino modular welded van roof rack complete with full length rear roller. The 3 piece assembly allows sor easy single person assembly and can take options such as a full length walkway and pipe carrier.