1) Drive in rack
This type of rack utilizes upright frames, rails, and ties to allow a vehicle to enter a storage rack structure from one side only and pick up or deliver pallets on continuous rails. Drive-in rack is used to address repetitive products and serves to take advantage of cubic space available for storage, when such unit loads do not lend themselves to block stacking.
2) Double row, double face shelving
One generally continuous row of units joined together, back to back and side to side to be serviced from two service aisles.
3) Exchange pallet
Refers to a pallet that is used by several shippers whose ownership is transferred when the ownership of the unit load is transferred.
4) Electric Hoist
A suspended machinery unit that is powered by electrically driven motors and is used to lift or lower a freely suspended (unguided) load. Generally uses chain or wire rope as its lifting medium.