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1. Travelling double girder gantry crane widely used together with winch or trolley for lifting device.
2. It is a medium and heavy size crane which travels in track.
3. Its proper lifting weight is 5 to 500 tons,and proper span is 6 to 60 meters.
4. Its proper working temperature is -20--+40 centigrade.
5. Travelling double girder gantry crane is composed of main beam, support legs, crane traveling organ, trolley, electric equipment, strong lifting winch.
link:https://www.kinocranes.sg/gantry-crane/gantry-crane-by-capacity/travelling-gantry-crane.html
Travelling Gantry Crane | Kenancranes