What are the types of cranes?

[MacDylan]

Cranes are used for lifting equipment, emergency rescue, hoisting, machinery, and rescue operations. Commonly used cranes include truck cranes, crawler cranes, and tire cranes. The specific details are as follows: Cranes are classified by mobility into: 1. Mobile types: truck cranes, crawler cranes, overhead cranes, etc. 2. Fixed types: dock cranes, tower cranes, gantry cranes, etc. Additional information: Safety devices of cranes: 1. Load indicator: An angle indicator installed near the driver's position at the base of the boom, which changes with the boom's elevation angle, reflecting the angle between the boom and the ground. By knowing the elevation angle at different positions of the boom and referring to the crane's performance table and performance curve, one can determine the reference values such as the radius, lifting capacity, and lifting height at a specific elevation angle. 2. Over-hoisting limiter: A safety device installed on the pulley group at the end of the boom to limit the lifting height of the hook and prevent over-hoisting accidents. It ensures that when the hook reaches the limit position, an alarm signal is automatically triggered or the power source is cut off to stop the lifting, thereby preventing over-hoisting.