Tower cranes are being utilized often for big building construction projects. They are needed for the heavy lifting and positioning of materials and machines. Tower cranes offer a different design that provides many benefits over more conventional cranes. These benefits include: higher vertical lift, quiet electrical operation, increased capacities, and reduced space requirements.
Hammerhead Crane
The hammerhead crane is commonly 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 travels along the length of the jib. The tower crane can operate anywhere within the jib's radius.
Self-Erecting Tower Cranes
Self-erecting cranes are often assembled on location with the help of a different crane. This greatly saves time in equipment costs and provides a huge advantage in setup time as well. Self-erecting cranes are often remote-controlled from the ground, although there are several models that have an operator cab built onto the jib.
Self-erecting cranes are usually freestanding and this allows them the opportunity to be able to be moved around. There are some models that have a telescoping tower that enables the crane to work at multiple heights without the need to reconfigure the tower.
Luffing Jib Tower Crane
Usually, in urban work environments, there is not enough clearance or space for the jib to rotate freely without being blocked by existing buildings. A luffing jib tower crane is ideal for such tight areas. The majority of tower cranes have a fixed horizontal jib. The operator is able to raise or lower a luffing jib in order to enable the crane to swing in a reduced radius.