What is an overhead crane?
An overhead crane is a crane which is permanently fixed in place overhead for the purpose of manipulating classically large and heavy objects which cannot be moved easily by hand. Steel mills usually have overhead cranes to handle the steel as it is fabricated into parts, and these cranes are also used at ports all over the world, to bring objects on and off ships. These cranes tend to be quite large, very expensive, and capable of moving huge volumes of material.