Drive-in-Racks are specially constructed structures that because of their design allow forklift trucks to enter the load position. A forklift would drive into the rack structure to place a load one behind another as well as over one another. This increases the storage capacity of the warehouse but reduces the selectivity. This form of rack is beneficial when pallets of identical material are to be stored without regard to FIFO (first in first out) storage methods. Forklift vehicles capable of entering such rack structures are typically counter-balanced sitdown types.