Frequently Asked Questions
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What is a multi-level shuttle ASRS?
A multi-level shuttle ASRS is a tote and crate storage system in which one shuttle serves several rack levels from a single aisle, instead of one shuttle per level. Addverb's Medius handles loads up to 30 kg, travels at up to 3.1 m/s and accesses 7 storage levels per aisle, with double-deep storage. Paired with a goods-to-person station, it brings stock directly to operators for picking. -
What is the difference between a multi-level shuttle and a carton shuttle?
A multi-level shuttle serves several rack levels with one vehicle, while a carton shuttle typically runs one shuttle on each level and relies on separate vertical lifts to move loads between levels. Addverb's Medius reaches 7 levels per aisle, so you need fewer vehicles for the same storage, which suits moderate throughput. Addverb's Quadron carton shuttle runs a shuttle per level, which suits higher throughput and loads up to 50 kg. -
How much storage density does a multi-level shuttle provide?
Addverb's Medius multi-level shuttle stores up to 36 totes per square metre of floor space, using double-deep racking up to 20 m high to make full use of the building's clear height. That lets you hold far more SKUs in the same footprint than static shelving with picker aisles. Narrow aisles and tall racking also mean the system can sit in an existing building rather than a new one, depending on clear height. -
How many totes per hour can a multi-level shuttle handle?
Addverb's Medius multi-level shuttle is rated at 103 totes per hour on a 30 m track, with loaded and empty speeds of up to 3.1 m/s. Several aisles operate in parallel, so system throughput scales with aisle count. Medius also supports parallel operations in narrow aisles, which helps peak order fulfilment, and sequences retrievals so pick stations receive totes in order. -
Can a multi-level shuttle be used for goods-to-person order picking?
Yes, Addverb's Medius multi-level shuttle retrieves totes and crates and delivers them to a goods-to-person station, so operators pick orders at one ergonomic workstation instead of walking aisles. The shuttle system can follow a programmed sequence for storage and retrieval, which keeps order release predictable. Medius integrates with existing warehouse automation, so it can feed packing, sortation or conveyor lines downstream.