DESIGN GUIDELINES FOR SELECTIVE PALLET RACKING (SPR)

Selective Pallet Racking (SPR) storage systems operate with medium or wide aisles and allow access to any pallet load in storage, enabling First-In First-Out (FIFO) inventory management.

SPR storage systems are commonly used and are most suitable for:

• Low volumes (up to 3000 pallets)
• Large range of Stock Keeping Units (SKU)
• Low land cost
• Direct access to every pallet in storage
• Multiple access (more than one truck in same aisle)

Advantages

• No special trucks required
• Low cost racks and trucks
• High through-put rates
• FIFO inventory management
• Floor level is not critical (front loaded)

Disadvantages

• Large land area required
• High storage cost when volumes are medium and above
• Limited storage height (12m)
• Medium to wide aisles required for handling

FOR REACH TRUCKS (wide aisles for medium Volumes)

• Aisle widths – 2.8 to 3.2m
• Storage Area – 45%
• Operating aisle area – 55%
• Lift height – up to 10.5m
• Through-put rate – 16 – 20 pallets par hour (pph)

FOR COUNTERBALANCED TRUCKS (wide aisles for low Volumes)

• Aisle widths – 3.8 to 5.5m
• Storage Area – 35%
• Operating aisle area – 65%
• Through-put rate – 20 – 24 pph
• Lift height – up to 8m

(Cubic capacity is based on pallet height and available clear storage height).

SUMMARY
Whilst Rack and Truck costs are lowest, storage unit cost is highest when building, racks and trucks are taken into consideration.