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.
Even in comparison with the column and/or jib cranes this benefit exists because no specific structural constraints are required.
- easier to maneuver, with lower inertia, than jib cranes themselves.
their "autonomous and independent" conformation makes them easy to move to other zones at any time without changes.
Suspended system use electrical chain hoists for lifting, horizontal movements can be pushed or driven. The facilities are normally made "in duct" in the Push version and with beams in the version with motorized horizontal movements. The constructive components are standardized for both the "bridges" and "runways", various fastening systems allow for suspension in most different situations.
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.