Cranes move materials and products through facilities, on construction sites, and other types of operations. Examples of cranes are gantry, overhead, crawler locomotive, and derricks. Safe use of a crane depends on several factors: Site evaluation, Operator training, Selection of the proper equipment for the job, Inspection of the crane, Good maintenance, Operators should be trained in the operation, limitations, and emergency procedures for the cranes they operate. They should understand the load ratings and how to lift loads properly. Selection of the proper equipment is a factor in operating cranes safely. The crane should be designed for the operation that it is to be used in. Review the manufacturer's specifications and recommendations to determine if a crane or derrick can be used in a particular application.