For huge building construction projects, tower cranes are used rather frequently. These machines are rather necessary for heavy lifting as well as placing supplies and equipment. Tower cranes offer a different configuration that provides numerous advantages over more conventional cranes. These advantages include: quiet electrical operation, higher vertical lift, increased capacities, and reduced space requirements.
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. There is a trolley on the hammerhead crane. This trolley has the lifting cable and could travel along the length of the jib. The tower crane could operate anywhere in the jib's radius.
Self-Erecting Tower Cranes
Self-erecting cranes are often assembled on site with the assistance of a different crane. This greatly saves time in equipment expenses and provides a huge benefit in setup time as well. Self-erecting cranes are normally remote-controlled from the ground, even though there are several models which have an operator cab built onto the jib.
The self-erecting crane is normally freestanding to enable 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
Nearly all urban work environments do not have enough clearance or space for the jib to rotate freely 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 driver is able to lower or raise a luffing jib in order to enable the crane to swing in a reduced radius.