Overhead cranes or a bridge crane as it is commonly called, is more often than not to be found in a industrial environment. Overhead cranes have parallel runways with a travelling bridge across the gap. The lifting component of the crane called the hoist, travels along the bridge.
An overhead crane is typically used for maintenance applications but most commonly they are used for manufacturing, where efficiency and downtime are very important factors.
Top running cranes
Top running bridge cranes are typically used for more severe applications with very heavy loads. they are generally used when the crane isle extends across the full length of the aisle in question. top running cranes are used when high running speeds are required.
Double girder cranes
Double girder bridge cranes are usually used on moderate spans. The trolley of a double girder crane is usually mounted on rails on the crane girders. Low head room double girder cranes are also available if space is an issue.
Under hung bridge cranes
Under hung bridge cranes are used typically with lighter loads and lower service classifications. They are used more often where multiple crane isles are in place in a building isle. compared to top running cranes, under hung bridge cranes usually will provide a grater hook cover and clearance.
The normal power source for these cranes is electricity and they are normally operated via a pendant control suspended from the hoist.
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