how are cranes put together

Cranes are an essential tool in the construction industry, used to move heavy loads both vertically and horizontally. They come in various sizes and shapes and can be seen in use on construction sites all over the world. But have you ever wondered how these complex machines are put together? In this article, we will explore the process of crane assembly, from the ground up.

Foundation Work

Before the crane itself can be assembled, the groundwork must be laid. This involves excavating the area where the crane will stand, and pouring a concrete foundation. The size and design of the foundation will depend on the type of crane that will be erected, and the specific requirements of the construction site. Once the foundation has cured, the crane assembly can begin.

Building the Mast

The mast is the central vertical component of the crane, consisting of a series of steel sections that are bolted together to create a single, tall tower. The entire mast is pre-fabricated off-site and transported to the construction site in sections. The bottom section is placed onto the foundation and bolted into position. The additional sections are then stacked on top of each other and secured in place, using a tower crane to lift and lower each component into position. As the mast is assembled, diagonal braces are installed to provide additional stability.

Installing the Slewing Ring and Jib

The slewing ring is a large, circular bearing that supports the jib and allows it to rotate. It is installed at the top of the mast and is typically the largest component of the crane. Once the slewing ring is bolted into place, the jib is attached to it, using bolts and heavy-duty pins. The jib is the horizontal arm of the crane, and its length will vary depending on the type of crane being assembled. The jib is also pre-fabricated off-site and transported to the site for assembly.

Adding the Counterweights and Final Assembly

The final step in crane assembly involves adding the counterweights. These large, heavy blocks are attached to the rear of the crane to prevent it from tipping over. The counterweights are suspended on a separate boom and lifted into position using a second, smaller crane. Once all the counterweights are in place, the crane assembly is finalized, and any finishing touches, such as wiring and controls, are installed.

Conclusion

In conclusion, crane assembly is a complex and labor-intensive process that involves a team of skilled professionals. From the foundation work to the final assembly, each step must be executed with precision to ensure the safety of those working on and around the crane. By understanding the process of crane assembly, we can appreciate the incredible engineering behind these essential construction tools.