Shuttle racking

Push-back's idea, powered up

Shuttle racking — often called radio shuttle — takes the deep-lane idea push-back racking and drive-in both use and replaces the mechanism with a powered cart. A forklift places the shuttle and a pallet at the mouth of the lane; the shuttle then carries that pallet deep into the lane under remote control and returns for the next one, entirely on its own. Because the shuttle does the work, lanes can run considerably deeper than push-back's nested carts allow, without a forklift or its operator ever entering the lane the way drive-in requires.

LIFO or FIFO — shuttle can do either

This is where shuttle genuinely differs from every other deep-lane system in this silo: run it single-entry and it's LIFO, the same as drive-in and push-back. Run it as a through-lane, loading from one end and picking from the other, and it behaves like flow-lane FIFO racking — true FIFO, powered rather than gravity-fed. That flexibility is one of shuttle's real advantages over the fixed rotation pattern every other deep-lane system locks in at build time.

The stock profile it suits

Shuttle suits a similar profile to drive-in — low SKU count, high pallets per SKU — but at higher volumes where the labour and time saved by not manoeuvring a forklift inside a lane starts to justify the equipment cost. It's also the better choice over drive-in specifically when FIFO matters, since the through-lane configuration gets that without needing pallet flow's two-sided gravity structure.

• Low SKU count, high pallets per SKU, similar to drive-in
• High enough throughput to justify powered handling
• FIFO needed but pallet flow's footprint or cost doesn't suit the site

What it costs you

Shuttle is one of the more expensive systems in this silo per pallet position — the shuttle units themselves are a real capital cost on top of the racking structure, and they need charging, maintenance and eventual replacement like any powered equipment. It's semi-automated, not fully automated: a forklift operator still places and retrieves the shuttle and handles pallets at the lane mouth, so it saves labour inside the lane without removing the forklift from the process altogether. Sites weighing shuttle against a fully automated storage system should treat it as the middle ground it is — meaningfully less capital and complexity than full automation, meaningfully more than push-back or drive-in.

The number of shuttle units matters as much as the racking structure around them. One shuttle can serve several lanes if it's moved between them, which keeps capital cost down but limits how many lanes can be worked at once; dedicating a shuttle to each lane costs more but keeps every lane independently active. That balance is worth working out against actual order patterns before committing, not assumed from the racking layout alone.

Common questions

Is shuttle racking fully automated?

No — it's semi-automated. A forklift operator still places and retrieves the shuttle unit and handles pallets at the mouth of the lane; the shuttle only handles movement inside the lane itself.

Can shuttle racking do FIFO?

Yes, if built as a through-lane with loading at one end and picking at the other. Run as a single-entry lane, it's LIFO like drive-in and push-back.

How is shuttle racking different from drive-in racking?

The shuttle carries pallets into the lane under remote control, so the forklift and operator never enter the lane itself, unlike drive-in where the forklift drives directly inside the rack structure.

Is shuttle racking worth the cost over push-back?

It depends on lane depth and throughput — shuttle reaches greater depths and higher cycle speeds than push-back's gravity carts, but the powered shuttle units add real capital and maintenance cost that push-back doesn't carry.

Read next

• push-back racking
• very narrow aisle pallet storage
• mobile racking
• shuttle vs stacker crane ASRS
• deciding whether ASRS is worth it
• selective racking