ndix1存贮ystems .pptVIP

4th yr Stor 1 App1.ppt Appendix 1 - Storage systems Palletised storage systems :Block Storage Features : unit load placed directly onto floor limited depth - 6 plts deep,- back to back 2x6 often used with counter balance - narrow chassis single product per line- limited SKUs large holding Advantages : no capital equipment required high floor utilisation 55% simplified management can use random access Disadvantages : limited stacking height 3-4 plts, - post pallets, converters difficult to achieve First In First Out (LIFO) limited access to pallets / greater need for double handling typical occupancy 60 -70% - honey-combing computerised location can be difficult to achieve Palletised storage systems :Adjustable Pallet Racking Features : vertical end frames, horizontal cross beams, usually storing 2 pallets per beam up to 8 m high variable slot heights, typically 1.5 -1.7 m large number of SKU, variable to low stock holding per SKU - low density cost per pallet stored ￡20 - ￡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 handling costs Palletised storage systems :Double-deep pallet racking Features : Standard APR placed back to back, each bay 2 plts deep x 2 wide requires floor level bottom beam limited SKUs with high stock holding per SKU - medium density cannot mix SKUs per bay location Bulk store application Cost per pallet stored ￡22 -￡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 Palletised storage systemsDrive-In (Drive Thru’) Racking Features : vertical support frames, tied at top, with cantileve