Basically they consist of small cranes suspended in existing structures or specially prepared to cover a working area. In recent years, due to their ease of use, this solution was widespread in many industrial environments.
The main advantages are:
fraction of the cost compared to a traditional bridge crane even with equal capacity.
it is possible to install them also in environments without any pre-arrangement without needing to work on or modify the building works.
Standardization for the duct "push" system provides:
Capacities from 125 to 250 - 500 - 1000 Kg.
Widths from 3 m to 7 m.
Whereas the "beam" motorized version provides:
Load up to 2000 kg.
Width up to 8 m.