For big building construction projects, tower cranes are used quite often. These equipments are quite needed for heavy lifting as well as positioning supplies and equipment. Tower cranes provide a unique design that offers lots of advantages over more conventional cranes. These advantages consist of: higher vertical lift, quiet electrical operation, increased capacities, and reduced space requirements.
Hammerhead Crane
The hammerhead crane is frequently associated with a tower crane. The long horizontal jib is attached to a vertical tower, in this case. One end of the jib acts as a counterweight and the other end of the jib extends horizontally over the worksite. There is a trolley on the hammerhead crane. This trolley holds the lifting cable and can travel along the length of the jib. The tower crane could operate anywhere in the jib's radius.
Self-Erecting Tower Cranes
A self-erecting crane is capable of completely assembling itself at the jobsite without any help from a secondary crane. This greatly saves time in equipment costs and provides a huge advantage in setup time too. Self-erecting cranes are often remote-controlled from the ground, though there are some models which have an operator cab built onto the jib.
Self-erecting cranes are normally freestanding and this allows them the opportunity to be able to be moved around. There are several models that have a telescoping tower that enables the crane to work at various heights without the need to reconfigure the tower.
Luffing Jib Tower Crane
Often, within urban work environments, there is not enough space or clearance for the jib to rotate freely without being blocked by existing buildings. A luffing jib tower crane is great for such confined spaces. Most tower cranes have a fixed horizontal jib. The driver can lower or raise a luffing jib in order to allow the crane to swing in a reduced radius.