City Cranes
The city crane is a small 2-axle mobile crane that is designed for use in compact areas where other cranes are not able to go. The city crane could work in between buildings and can travel through gates. In the 1990s, City cranes were developed as a solution to the increasing urban density in the country of Japan. Many cities in Japan began building and cramming more structures in close proximity and it became necessary to have a crane which was capable of navigating through the tiny roads in Japan.
Essentially, the city crane is a small rough terrain crane. This crane is designed to be road legal and is characterized by a single cab, a short chassis, independent axle steering, and the 2-axle design. Furthermore, these equipments provided a slanted retractable boom. This style of retractable boom takes up much less space than a horizontal boom of comparable size would.
Typical Truck Crane
A mobile crane that has a lattice boom is a typical truck crane boom. This unit is lighter than the hydraulic truck crane boom. There are multiple boom parts that could be added to enable the crane to reach up and over an obstacle. A standard truck crane requires separate power to be able to move up and down, since it could not raise and lower with hydraulic power.
Kangaroo Crane
A kangaroo crane or jumping crane is a articulated-jib slewing crane that is designed with an integrated bunker. These cranes were initially developed in Australia. They are usually utilized in high-rise construction projects. Kangaroo cranes are unique in the industry in the way that they are capable of raising themselves while the building they are working on increases in height. These specific cranes are anchored utilizing a long leg. This leg runs down an elevator shaft of the building they are constructing.