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World-Class Warehousing and Material Handling

include the types of systems at the end of the rack (some ASRS are built underground) and the middle of the rack.

Automated Guided Storage/Retrieval Vehicles Automated guided storage/ retrieval vehicles are driverless counterbalance trucks (Figures 5.46 and 5.47). Automated storage vehicles receive communication through and run on a grid of wires buried a fraction of an inch beneath the surface of the warehouse floor. Automated storage/retrieval vehicles are rare but can be justified when wage rates are high, when labor is scarce, and when move rates are high and stable, and there are overpredictable paths.

Figure 5.46 Automated storage/retrieval vehicle

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