What are the three basic types of overhead cranes?

Single Girder Overhead Crane: This type of crane consists of a single beam that runs along the top of the runway structure. It is commonly used for light to medium lifting tasks and is cost-effective.

Double Girder Overhead Crane: In this type of crane, two beams are used to support the lifting mechanism, allowing for increased lifting capacity and greater stability. It is suitable for heavy-duty lifting operations.

Gantry Crane: Unlike the previous two types, a gantry crane is not attached to a building structure. It has two supporting legs that run along the ground and can be moved horizontally. Gantry cranes are commonly used in outdoor environments or in facilities lacking overhead support.