Weldco Sales Inc. offers chassis-mounted racks with straight ledgeboards. The company provides a 5-inch ledgeboard for Chevy 3500 Duallys and a straight, 7-inch ledgeboard for Isuzus, Hinos and other cab over chassis trucks. There is no “up, over and down” portion of the ledgeboard to interrupt the loading space in front of the wheels, and the racks can be added without voiding manufacturer warranties.