(B) the composition of the tower crane
    Generally speaking, the various parts of crane construction hoists by the functions can be divided into: basic, tower, top up, turning, lifting, balancing arm, lifting arms, lifting car, tower cab, amplitudesome other.Tower crane installed on the ground need to base part of it; tower is a tower crane body, but also elevated part of it; the top is to make up part of the tower crane can be raised; rotation is to maintain the level of the tower crane can rotate the upper body; hoisting mechanism used to the weight increase together; balancing arm is to maintain the torque balance; lifting heavy weights boom in general is to upgrade the force component; car used to install a pulleyropehook,it is directly affected by the force component; tower Top of course, is used to maintain the force balance arm; driver''''''''s cab is where the action is; amplitude is to make the trolley along the track running.

(C) self-rising tower crane
     Elevated tower cranes own a lot of people do not understand, is actually very simple, tower cranes are one liters sets of planes up in the top frame when you first set up high-rise after the relative height of the tower after the tower,sets the middle frame there will be a space, then a standard tower sections will be installed in the space inside sets of planes in this rise, once again in the vacated units to install into the standard internal frame section, so that, with the steady increase in the standard section, become a high tower crane is not it?

(D) the price of tower crane
    The price of tower cranes speciesmodels according to different sizes  and  prices from hundreds of thousands to tens of millions range. General domestic tower crane Shandong lower prices because of the design streamlined, foreign brands such as Liebherr, Potain, Ke Manshaso on, the price of tens of millions of dollars.