For big building construction projects, tower cranes are utilized quite often. These machines are rather needed for heavy lifting as well as positioning materials and equipment. Tower cranes provide a different configuration which provides numerous benefits over more conventional cranes. These advantages comprise: higher vertical lift, quiet electrical operation, increased capacities, and reduced space requirements.
Hammerhead Crane
A hammerhead crane is a different design which is most typically associated with a tower crane. In this case, a long horizontal jib is connected to a vertical tower. One end of the jib extends horizontally over the worksite and the other end of the jib acts as a counterweight. There is a trolley on the hammerhead crane. This trolley has the lifting cable and travels along the length of the jib. The tower crane can 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 provides a huge advantage in setup time and really saves time in equipment costs too. Self-erecting cranes are normally remote-controlled from the ground, although there are some models that have an operator cab built onto the jib.
The self-erecting crane is usually freestanding to allow them the opportunity to be moved around. There are several models that have a telescoping tower that allows the crane to work at multiple heights without the need to reconfigure the tower.
Luffing Jib Tower Crane
Normally, in 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 ideal for such tight areas. Most tower cranes have a fixed horizontal jib. The driver could raise or lower a luffing jib in order to enable the crane to swing in a reduced radius.