For large building construction projects, tower cranes are used quite often. These machinery are quite required for heavy lifting as well as positioning materials and equipment. Tower cranes provide a unique design that offers many benefits over more traditional cranes. These benefits comprise: quiet electrical operation, higher vertical lift, increased capacities, and reduced space requirements.
Hammerhead Crane
The hammerhead crane is commonly associated with a tower crane. The long horizontal jib is connected to a vertical tower, in this case. 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 holds the lifting cable and travels along the length of the jib. The tower crane can operate anywhere within the jib's radius.
Self-Erecting Tower Cranes
A self-erecting crane is capable of completely assembling itself at the jobsite without any assistance from another 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, although there are several models which have an operator cab built onto the jib.
Self-erecting cranes are usually freestanding and this enables them the opportunity to be able to be moved around. There are several models which have a telescoping tower that enables the crane to work at various heights without the need to reconfigure the tower.
Luffing Jib Tower Crane
Most urban work settings do not have enough space or clearance for the jib to freely rotate without existing buildings blocking its movement. A luffing jib tower crane is ideal for such tight spaces. Most tower cranes have a fixed horizontal jib. The operator can lower or raise a luffing jib in order to allow the crane to swing in a reduced radius.