how do they put up sky cranes

Sky cranes are enormous hydraulic cranes used in the construction of the tallest and largest buildings in the world. Sky cranes are quite impressive due to their massive size and abilities, however, few people actually understand how they are put up. In this article, we will explore how sky cranes are put up.

Building the Foundation for the Crane

Before a sky crane is erected, construction crews must first lay a concrete foundation that is capable of supporting the weight of the massive machine. This foundation is constructed by drilling deep into the ground until they reach soil that is compact enough to hold the weight of the crane. After laying the foundation, construction crews then erect a tower with the help of a smaller crane that will support the sky crane’s weight and allow it to climb to higher heights on the building.

Assembling the Crane Components

Once the foundation is set and the tower is erected, the crane’s components are ready to be assembled. This process requires a crew of engineers, electricians, and crane operators. The crane’s arm sections are bolted and welded together underwater while they are floating to ensure that they are even. Then, the crane’s motor and hydraulic systems are installed in accordance with the crane’s electrical and control systems.

Hoisting the Crane Arm

The crane arm is constructed horizontally on the ground and then hoisted with a hydraulic lifting system. The crane arm is lifted from the ground and bolted into place at the top of the crane’s tower. Once bolted and secured, the hydraulic systems are engaged, and the arm is extended and tested to its full length. After the crane arm is fully extended and tested, the installation of the counterweights begins. Our crane weighs 900 metric tons, with the majority of that weight found in the counterweights.

Testing the Crane for Security and Stability

Once the crane is fully erected, it must be tested to ensure it is both secure and stable. This process begins by hoisting a test weight to the full length of the crane’s arm and swing radius and then returning the test weight to the ground. After this test is successfully passed, the crane is ready to begin its work.

The Conclusion

In conclusion, the process of putting up a sky crane is a massive undertaking that requires advanced engineering and construction knowledge. As we have seen, the construction of the foundation is the first and most essential stage of putting up the crane. Then, with the help of smaller cranes, the tower is built, and the crane is assembled. After the crane arm is hoisted and bolted into place, a rigorous testing process is performed to ensure its stability. By understanding how the massive machine is erected, you can gain an even greater appreciation for the abilities of the world’s tallest buildings and the people who build them.