Used Tower crane
What is the specification of a tower crane and what should be noted for buying?
- 1- Jib
- 2- Counter Jib
- 3- Mast section: its number is according to the manufacturer’s catalog
- 4- Main base
- 5- Slewing
- 6- Cathead
- 7- Wire rope:
- ََA) Hook = Counter Jib length + Jib length + height × 4
- B) Chariot: Rear Wire = Jib length & Front wire = Jib length × 2
- 8- Telescopic system: Cage, Yoke, Monorail, Jack and Pump purchase according to need
- 9- Counter weight ballast: Quantity and number in accordance with the manufacturer’s instructions
- 10- Tie bars
- 11- Operator’s cabin
- 12- Electrical panels
- 13- Altitude cables: Cable length is equal to height of bought tower crane
- 14- Erection system:
- A) Trolley (Bogie, Chassis, counter weights): It must have a rail capability and also be installed on the rails according to the conditions.
- B) Fixing angle: This system is commonly used in projects with less installation space and will always remain in the foundation.
How to choose a tower crane model?
- 1- Loading radius (r)
- 2- How much is the maximum load from the center of the loading? (a = Max load)
- 3- Minimum load at the last point of loading (a = r = Min load)
- 4- Free standing H=?
According to the project conditions, the minimum height of the tower crane should stand on its base and not be involved with the structures surrounding the project.
How to erection tower crane?
- A) Cage: required space 4.5×4.5 , 6×6 , … m
- B) Fixing angle: dimension = one mast section for example 1.6 × 1.6 and 2 × 2 m
Used Tower Crane
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