Frequently Asked Questions
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What is a stacker crane ASRS?
A stacker crane ASRS is an automated pallet storage system in which a rail-guided crane travels along an aisle and lifts loads to rack positions on both sides, storing and retrieving pallets without forklifts or operators. Addverb's Skyron handles unit loads up to 1,500 kg, travels at up to 4 m/s and uses laser positioning for accurate placement. Warehouse software tracks every pallet location in real time. -
How high can a crane ASRS go?
Addverb's Skyron crane ASRS stores pallets in racking up to 40 m high, which lets you hold far more pallets on the same land area than a conventional forklift warehouse. At these heights the racking often forms the building structure itself, known as a rack-clad building. Building height, soil conditions and local planning rules set the practical limit, so Addverb's free warehouse layout generator is a useful first step. -
How many pallets per hour can a stacker crane handle?
Addverb's Skyron stacker crane handles up to 30 pallets per hour per crane, and total system throughput scales with the number of aisles and cranes. Cranes suit steady, moderate flows such as raw material, work-in-progress and finished goods storage. When you need higher throughput per aisle or more flexibility to grow, a 4-way pallet shuttle system, which adds capacity by adding shuttles, is often the better fit. -
Can a stacker crane store pallets more than one deep?
Yes, Addverb's Skyron supports multi-deep storage by pairing the stacker crane with a child shuttle that travels into deeper rack lanes, which raises storage density compared with single-deep cranes. Aisle-changing cranes can also serve more than one aisle, which reduces the number of cranes in low-throughput areas. The minimum approach dimension of 500 mm keeps more usable height and length for storage. -
When is a stacker crane ASRS not the right choice?
A stacker crane ASRS is a poor fit for low buildings or operations that need high throughput from a single aisle, because each crane serves its aisle alone and handles up to 30 pallets per hour. If that crane stops, its aisle is unavailable until it restarts, so critical SKUs should be spread across aisles. For lower-height sites or fast-growing volumes, a 4-way pallet shuttle usually offers more flexibility.