Under-running overhead cranes
Looking for a crane solution for your workshop, production facility or warehouse? Under-running overhead cranes let you move loads efficiently above the shop floor. Because the crane runway is suspended from the overhead structure, floor-mounted support columns are often not needed. Mennens can help you find a solution that suits your work and the structure of your building.
What is an under-running overhead crane?
An under-running overhead crane also know as underhung overhead crane or underslung overhead crane is suspended from the underside of a crane runway. The runway is usually attached to the roof or another overhead structure. The crane travels along the runway, allowing you to lift and move loads within a work area.
With a top-running overhead crane, the crane travels on top of the runway. The runway is generally supported by a separate steel structure or by the building’s supporting structure. The main difference is the crane’s position in relation to the runway and how the runway is supported.
What types of under-running overhead cranes are available?
There are several designs to suit different load weights and applications:
- Single-girder I-beam under-running crane – for loads up to 20 tonnes.
- Double-girder under-running crane – for loads over 20 tonnes.
- Single- or double-girder monorail crane with a C-profile – available in steel or aluminium, for loads up to 2,000 kg.
The most suitable design depends on more than the maximum load. The span, lifting height, frequency of use, required travel direction and load-bearing capacity of the overhead structure are also important.
When is an under-running overhead crane a good choice?
An under-running overhead crane can be a good solution when you want to make efficient use of the space in your workshop. The floor often remains clear of support columns, which is useful if you need room for machinery, internal transport or other work.
An under-running crane may also be worth considering when headroom is limited. In some situations, this design makes better use of the available space than a top-running overhead crane. Whether that applies to your building depends on factors such as the structure, the required lifting height and the crane runway layout.
Under-running or top-running overhead crane?
An under-running overhead crane hangs below the runway; a top-running overhead crane travels on top of it. The right solution depends on your building and application.
An under-running crane may be a good fit if the overhead structure can support the runway and you want to keep the floor as clear as possible. A top-running overhead crane may be more suitable if the runway needs to rest on a separate supporting structure or your application calls for a different layout.
Key considerations include lifting capacity, span, required lifting height, how the crane will be used and the load-bearing capacity of the structure. Assessing these factors helps determine which solution is practical and safe for your situation.
Advice on under-running overhead cranes
Every building and lifting application is different. We’re happy to help you explore the options and key considerations when choosing an under-running overhead crane.
Wondering which type of under-running overhead crane is right for your workplace? Get in touch with Mennens for advice or a tailored proposal.
