Standard mast section of tower crane

Mast section is composed of standard joints which are formed by group welded of angle steels with the structure of long square space trusses. Every two standard joints of tower body are connected firmly by Level 10.9 M27 high-strength bolts and screws. Inside each standard joint there is a ladder with the same length so as to facilitate manipulation and maintenance personnel getting on and off tower crane. There is one rest platform every three joints. All standard joints have interchangeability. By changing the number of tower body standard joints installed, the crane will reach different lifting heights.
Two groovy footsteps are welded respectively on two main chords on the same side of standard joints. This position of main chords has been strengthened. While doing jack-up work, with the expansion of jack-up cylinder, shaft heads at two ends of jack-up beams and climbing claws of jack-up set frame fall into the footstep groove successively according to the procedure, so as to make jack-up set frame elevate vertically along with tower body. When two cycles of motion are completed, the jack-up set frame will elevate one standard joint height. Accordingly, at this time, one standard joint could be added. Repeat motion like this to make tower body achieve required height. When disassembling the tower crane, the reversed procedure is adopted to lower the height of tower body step by step

Dimension ofmastsection:

1.5m*1.5m*2.2m for QTZ50 4808/4810/5008
1.606*1.606*2.5 for QTZ63 TC5012
1615m*1.615m*2.5m for QTZ60 TC5010/QTZ63 TC5010
1.68m*1.68m*2.5m for QTZ63 TC5013
1.8m*1.8m*2.8m for QTZ63 TC5610/QTZ80 TC6010
1.835m*1.835m*2.5m for QTZ80 TC5513/QTZ100 TC6010/QTZ125 TC6515
2.0m*2.0m*3m for QTZ315 TC7040 tower crane

Also we can supply stand section, example L46A3 or L46A1, if you need any information, pls kindly contact with us!




Automatic impeller blasting and spraying assembly line
The company adopts the world first-class automatic spraying assembly line. The large structure parts are dealt with  impeller blasting before spraying. That effectively removes steel surface oxides and welding spatters, eliminates the internal stress in welding process, increases the parts' anti-fatigue strength and steel surface hardness, and increases painting adhesion, so that it prolongs the service life of the product, maximizes efficiency, and saves energy

 Our services
1. Customized service. We can do all special design according to your requirement
2. welcome visit our factory, learn about our factory and products. 
3. 24 hours on line or phone , technical support
 
After sale service
1. We provide free spare part with equipment and send Technicians to maintenance when necessary.

2. The Seller will send one of her experienced engineer to the Buyer's site to help the
completed installation works and training operators under the requirement of the Buyer.

3. 12(twelve)months (except for wire rope and AC contactor) after the equipment be well erected and we will offer spare parts whole year long. 

4. lifelong time freely provide technical support .