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24 Advantages : – improved floor space utilisation 45% Disadvantages : – limited access to each pallet LIFO – constrained random access – potentially increased double handling – slower retrieval rate higher damage – expensive double deep reach trucks – limited pallet weights derating – needs high quality pallets 13 Doubledeep pallet racking 14 Palletised storage systems DriveIn (Drive Thru’) Racking Features : – vertical support frames, tied at top, with cantilever support beams – forklift drives in or through the rack – limited SKU’s very high stock level per line high density seasonal movers large single batch loads – Bulk store, cold store application – racked block storage LIFO – Cost per pallet stored 163。22 Advantages : – open access to all locations, FIFO, good control – high occupancy rate 90 95% – good retrieval rate – flexible reserve or pick locations – easily adjustable and changeable Disadvantages : – low space utilisation 30% nos. of aisles – higher