Tower cranes are being utilized frequently for large building construction projects. They are essential for the heavy lifting and placing of supplies and machines. Tower cranes provide a different configuration which provides a lot of benefits over more conventional cranes. These advantages comprise: quiet electrical operation, higher vertical lift, reduced space requirements and increased capacities.
The hammerhead crane is usually 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. On the hammerhead crane, there is a trolley. This trolley has the lifting cable and can travel along the length of the jib. The tower crane is capable of operating anywhere in the jib's radius.
Self-Erecting Tower Cranes
Self-erecting cranes are usually assembled on location with the assistance of another crane. This greatly saves time in equipment costs and provides a huge benefit in setup time too. Self-erecting cranes are usually remote-controlled from the ground, though there are some models that have an operator cab built onto the jib.
The self-erecting crane is generally freestanding to allow them the opportunity to be moved around. There are some models which have a telescoping tower which allows the crane to work at multiple heights without the need to reconfigure the tower.
Luffing Jib Tower Crane
Normally, in urban work settings, there is not enough clearance or space for the jib to freely rotate without being blocked by existing buildings. A luffing jib tower crane is great for such tight spaces. The majority of tower cranes have a fixed horizontal jib. The operator can raise or lower a luffing jib in order to enable the crane to swing in a reduced radius.