A Guide to the Different Tower Crane Parts

Don’t miss this opportunity to elevate your understanding of tower crane intricacies. In our guide below, we will share the ins and outs of the different tower crane parts. If you’re in the construction industry, it’s important to understand the anatomy of these machines. 

Keep reading to learn all there is to know about construction cranes. 

Mast Section

The mast section of a tower crane stands as the vertical backbone. It’s the part of the crane that dictates its height and lifting capacity. The primary function of the mast section is to provide vertical support to the tower crane. 

As buildings under construction get taller, more mast sections are added in order to make the crane taller. Mast sections are designed to be modular. This makes it easy to adapt the crane to the changing structures. 

Standard mast sections are the most commonly used. They provide a balance between height and stability. 

Counter Jib

The primary function of the counter jib is to counterbalance the weight of the load being lifted by the tower crane. The counter jib is positioned on the opposite side of the tower crane’s jib. While the jib extends horizontally to carry the load, the counter jib works in tandem to provide the necessary counterbalance.

The counter jib is an integral part of the tower crane’s structural design. It connects to the mast and serves as a supporting structure for the counterweights, completing the balance equation in the crane’s overall configuration.

Regular inspections of the counter jib are essential to check for signs of wear, stress, or any structural issues. We recommend Liebherr diagnostic software when it comes to crane maintenance. 


This is also known as the horizontal boom. The jib extends horizontally from the mast and carries the load. It can be raised or lowered to different angles, allowing the crane to cover a specific radius. The length of the jib determines the crane’s reach.

Hook Block and Hoist Cable

The hook block is the assembly that holds the load, and it is attached to the hoist cable. A large truck crane can have a hook that weighs between 400-700 lbs. 

The hoist cable, wound around the drum, is responsible for lifting and lowering the load. Different configurations of hook blocks and cables accommodate various lifting requirements.


The base is the foundation of the tower crane, it provides stability and support. The base is anchored to the ground, and its design is critical to withstand the loads and forces exerted during crane operations.

Machinery Arm

The machinery arm houses the motor and gears responsible for operating the crane. The arm is integrated with the mast, so it helps with aligning everything and keeping the crane stable. 

Now You Know the Different Tower Crane Parts

Understanding the different parts of a tower crane can come in handy when you’re at your next project. As you can see, each component plays a major role in the crane’s ability to lift and move. 

If you enjoyed our guide, don’t leave without browsing the rest of this section for our latest helpful guides.