Tower crane has a high tower, tower mounted on top of the boom, with higher effective height and larger working radius, boom can swing 360. Therefore, tower cranes and high-rise structures in the multi-lifting and vertical transportation is widely used. Type of tower cranes, according to whether the running gear, luffing method, rotary parts division and climb methods. The following briefly describes the common rail, climbing, tower crane attached.

 

(1) Track tower crane. Rail tower crane is the most widely used in civil engineering a crane.

It can take heavy walking, big kitchen jobs Fan, less non-productive time, high production efficiency. The main performance track tower cranes are: boom length, lifting magnitude, from the weight lifting speed and walking speed.

 

(2) climbing tower crane. Also known as climbing inside the tower crane is usually installed in the building's elevator shaft or ad hoc bay can also be installed in the cylindrical structure, relying on climbing bodies rises with increasing structure, usually every construction 3 ~ Sm, cranes will climb once the height of the tower itself is only about 20m, lifting height with construction height may be.

Advantages climbing cranes are: support for the crane to the building, the tower is short, lifting height and large, and does not occupy space outside the building. Disadvantages are: driver jobs often can not see the whole process of lifting, need to rely on the signal conductor, disassemble complex after the construction, the general need to set up an auxiliary crane removal.

 

(3) attached to the tower crane. Also known as self-elevating tower crane fixed directly to the concrete foundation of the building or structure in the vicinity, with the increase of the structure, then continue on their own high tower, so increasing the lifting height. In order to stabilize the tower, the tower height of about 20m with every stalk and structural anchoring system. Attached tower crane structure due to installation in the vicinity, the driver can see the whole process of lifting, its installation and removal without prejudice to the construction process.