Drive In

Drive-in racking offers the highest possible densities of pallet storage, with the lowest selectivity.  Consequently, it is ideal for fast moving product which moves on a "pallet-in pallet-out basis."

Drive-in racking is a series of tunnels with rails on either side to hold the pallet.  Lift trucks can drive into any given tunnel to retrieve or put away pallets.

Key Benefits:

  • High density racking system, with virtually unlimited depth.
  • No specialized fork lift trucks needed.
  • Racking is less expensive than dynamic storage solutions (pushback / pallet flow).
  • Level storage medium - no concerns about height restrictions as with sloping systems.
  • LIFO - if stock rotation is an issue, you need to ensure that tunnels are being fully emptied before replenishing.
  • Significant reduction in pick slots, as there are fewer aisles and each tunnel can store only a single SKU, from floor to ceiling- so e.g. in a 4 level system, there are 4 times fewer pick slots on any aisle vs. other systems. Plus, there are added slots lost vs. selective, since there are fewer aisles in a given floor area.
  • Typically, observed capacity utilization is lower than for other systems, around 60%-70% is not uncommon.
  • Drive-in systems have more "sway" or lateral movement than other systems since there are no beams or cross ties between the front and middle frames. Drive-ins are also the most prone to lift truck abuse, since the trucks drive in and out of each tunnel. Therefore, quality engineering and robust manufacturing are both critical to a successful installation.

Advantages:
Over Single Selective Racking

The level of improvement depends on the depth of the drive-in. In theory, the deeper the drive-in, the greater the improvement. But, proportionate storage improvements will only be realized if capacity utilization is at least as high as in selective racking. That said, for a 4 deep back to back system, the improvement over selective is as follows:

  • Floor space savings of 35-40%.
  • Storage capacity increases of over 50%.

                  Illustration shows a typical 5 deep application

         Drive In      Drive In Illustration   
          please click on an image above to enlarge