The development of more reasonable metal structure and components, in order to reduce the metal consumption; the development of great weight of the crane; improve work speed, expand the range of speed; the research of structural vibration problem; reliability progress of metal structure and electrical equipment and service life; improve the premise of driver's operation, ensure the safety work progress degree of automation control and expand the scope of use of distance control system especially to apply them to the metallurgical crane homework frequent warehouse stacker crane and harsh environment of the.

Jib crane can generally be turned through the slewing and luffing jib crane, or lifting the car along the arm of the operation, so that the weight of a specific range of movement. The utility model is mainly used for lifting and transporting goods, and can also be used to carry out bulk material and liquid material after being equipped with suitable sling. Some cranes also have a certain process to complete the work of special equipment, such as the clamp crane clamp.

Crane failure will cause accidents and economic losses, the significant person so equipped with safety devices of various crane on the crane, such as to prevent the load limiter overload, travel switch or heavy car sling position limits, crane, crane was blown away from the crane rail clamping device, and signal device etc..

There are many ways to operate the crane, usually in the driver room operation; can also be used on the ground button operation can also be wired or wireless remote control. The lifting trolley runs along the track of the bridge, and the rectangular working range can be obtained through the movement of the bridge and the lifting trolley. In modern cranes, both sides of the wheels are usually driven by their own independent drive, but also by the use of electric motors, reducer and brake into one of the "three in one" way. There are different types of cranes, the main load-bearing components such as bridge, arm and door frame can be a box structure or truss structure, can also be a web structure. The crane should pay particular attention to the overall stability of the boom, that is to ensure that it does not occur under the action of external load.