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.