Difference Between Single Girder & Double Girder Crane

If you are talking about overhead bridge cranes. We have single girder or beam overhead (travel on top of the rails) cranes. We also have a double girder or beam nestled underhung (hangs and travels on the bottom of the rails) crane. The underhung is for low head room areas. The overhead is for when you have plenty of headroom. Which is the better? Depends on the location, structural and other factors.

Double girder cranes are harder however as per the business standards both single and double girder cranes are equally rigid, strong and difficult. This is often as a result of single girder cranes use a lot of stronger girders than double girder cranes. The distinction between single and double girder cranes is that the effective lifting height. Generally, double girder cranes give higher lifting height. Single girder cranes value less in many ways, just one cross girder is needed, tram is less complicated, installation is faster and runway beams value less as a result of the lighter crane dead weight.