Single Girder Crane Parts | Reva Industries Ltd. 

A geared trolley is more ergonomic than its basic, manual counterpart. As the name suggests, this option can pull on a durable chain. Quite akin to a basic over the head door operator, the chain in a geared product would hang over the trolley. Also, this type of trolley does not depend on the manual push and pull activities. They would roll with the wheels of the trolley, just along the beam. If you are ordering these trolley types, then make sure to specify the hand chain drop you desire. Even when you are hiring them, inquire whether your agency can customize it as per your requirement.loadmate.in/

Why girder design angled at the ends pls explain