Tower cranes are a modern form of balance crane that consist of the same basic parts. Fixed to the ground on a concrete slab (and sometimes attached to the sides of structures), tower cranes often give the best combination of height and lifting capacity and are used in the construction of tall buildings.

The tower crane supports the structures under construction. This support means moving tools, equipment and building materials from one part to another.

The crane is usually fixed in place inside the construction site using a foundation. The device has a horizontal lever, arm, canvas or Jib supported by a vertical metal rig. The horizontal lever can rotate 360 degrees.

Generally, the use of tower cranes can be summarized as follows:

• Dam construction
• Bridge construction
• High-rise constructions
• Residential, office and commercial constructions
• Industries, power plants and factorie

Specifications of tower crane

All tower cranes usually have the same specifications, but it should be noted that there may be slight differences depending on the model and manufacturer. However, the specifications of the tower crane are as follows:

• Unsupported maximum height: 265 feet or 80 meters (as the building increases around the crane, the tower crane can increase in height if attached to the building)
• Maximum access at altitude: 230 feet or 70 meters
• Maximum capacity of tower crane: 19.8 tons or 18 metric tons
• Concrete weights: 20 tons or 16.3 metric tons

Note that the maximum load is 18 tons, but when the load is at the end of the edge, the crane cannot lift that much weight. The closer the load is to the mast, the more weight the crane can lift.

Operators have two switches to prevent overload, the first is the maximum load switch to stay below 18 tons and the second is the maximum moment switch to protect the crane from the bending force of the load

Climate monitoring at construction sites is important, especially when using a tower crane. A strong wind can destabilize the tower structure and cause the load to fall down. Project managers must constantly review meteorological forecasts and avoid lifting loads in adverse weather conditions.