L68A1 Mast Section How to choose tower crane? What type of high-rise and super high-rise buildings should be selected for construction
1 about which tower crane to choose
L68A1 Mast Section：
http://www.towercranesupply.com/product/l68a1-mast-section-for-tower-crane-masts
When choosing the tower crane, the first thing is to choose the proper parameters of the self lifting tower crane. Among the parameters, the most important are the main parameters: amplitude, maximum amplitude lifting capacity and lifting height. However, when determining the main parameters, it is also necessary to determine which type of tower crane to choose: internal climbing tower crane or attached tower crane; luffing boom tower crane or trolley luffing horizontal boom tower crane. Experience shows that the function of a 40 t · m internal climbing tower crane is equal to that of an 80 t · m attached tower crane. The attached tower crane needs to be equipped with more standard sections of the tower crane, and a necessary number of attached rods and corresponding anchors. Therefore, it is economical and reasonable to choose the internal climbing tower crane in order to save one-time investment.
However, in order to ensure the safety of production and obtain the best benefit, the construction organization design of hoisting construction with internal climbing tower crane and the dismantling scheme of tower crane after the completion of the structure should be done well. At present, most of the domestic self elevating tower cranes are trolley luffing horizontal boom self elevating tower cranes, only a few factories produce a small number of luffing luffing boom type tower cranes. Therefore, from the perspective of supply, it is more convenient to select horizontal boom tower crane. However, when it is necessary to build a tower like high-rise building in a forest like environment, the luffing boom tower crane is a reasonable choice. Because the boom can pitch freely, the boom will not swing over the adjacent high-rise buildings, nor collide with the surrounding high-rise buildings. It is because of the above characteristics that the boom type self lifting tower crane is used in the construction of HSBC building in Hong Kong. For the same reason, some Southeast Asian countries have introduced some boom type self elevating tower cranes from China in recent years for the construction of high-rise buildings.
L68A1 Mast Section：
http://www.towercranesupply.com/product/l68a1-mast-section-for-tower-crane-masts
2. Buy or rent a tower crane
It costs about 1.1 million yuan to buy a 120 t · m tower crane, which is not a small amount for a construction contractor. In addition, in addition to the interest, the salary and bonus of drivers, maintenance workers and electricians, as well as the cost of power, oil and spare parts must be borne every month. After the completion of the project, the whole machine will be transported to the base for storage and maintenance, which will require another expenditure.
The advantages of renting 1 tower crane are:
(1) there is no need for a special person to take care of the tower crane, and the leasing company is responsible for the driving, maintenance and repair of the tower crane;
(2) there is no need to ask about the entry and exit of tower cranes, storage and maintenance. That is to say, as long as the monthly rent is paid, the desired hoisting service can be obtained, and the rest can be ignored.
L68A1 Mast Section：
http://www.towercranesupply.com/product/l68a1-mast-section-for-tower-crane-masts
