Third, the tower structure rotation mode

Can be divided into the rotation ( rotating tower ) and turn on the ( non-rotating tower ) tower crane .
Slewing tower crane will lower slewing , etc. counterweight disposed in the lower end of the main body , and its advantages are: tower suffered few moments , low center of gravity , good stability, electrics tacker installation and maintenance , the disadvantage is more demanding slewing high mounting height is restricted.
Slewing tower crane on the slewing ring , a counterweight , major institutions are set at the upper end , the advantage is due to the tower does not turn , simplifies the tower substructure , lifting plus festival convenient. Disadvantages are: When the building over the tower height , due to the impact of the balance arm to limit the rotation of the tower crane , while the higher center of gravity , air pressure increases, the pressure weight increased , so that the total weight of the machine increases.
Fourth, the crane installed in different ways
Be able to be folded into transport, the overall self- erecting tower crane for quick installation and requires the use of auxiliary equipment for group fight and dismantling of tower cranes .
Able to set up their own fast -loading machines are small and medium under the tower slewing cranes , mainly for short duration, requiring frequent movement of low-rise buildings , the main advantage is to improve work efficiency , saving installation costs , saving time and labor and material , the disadvantage is complex structure, the amount of maintenance .
Subject auxiliary dismantling tower crane is mainly used in high-rise buildings and a large range of work , lifting a large quantity of places, is the construction site of the main types .
Five , according to whether the structure of the spire
Can be divided into flat and Pallet stackers tower crane tower crane .
Flat top tower crane is developed in recent years a new type of tower crane , which is characterized in the original jack-up tower crane structure before and after the abolition of the spire and its rod section boom enhances the structural strength and balance arm , arm and balance arm is directly connected , its advantages are: 1 , the whole small , easy to install safety, reduce transportation and storage costs ; 2 , boom tolerated good performance , force uniform, and connecting parts of the structure damage to the small ; 3 , part design standardized, modular , interchangeable , reduce equipment idle , improve investment efficiency , the drawback is the same type of tower crane tower crane Zhongping head slightly higher price .