City Cranes
The city crane is a small 2-axle mobile crane that is designed to be used in compact areas where other cranes could not go. The city crane can work in between buildings and could travel through gates. In the 1990s, City cranes were developed as a solution to the increasing urban density within the country of Japan. Many cities in Japan began cramming and building more structures in close proximity and it became necessary to have a crane that was capable of navigating through the small roads in Japan.
Basically, the city crane is a small rough terrain crane. This crane is made to be road legal and is characterized by a short chassis, a single cab, independent axle steering, and the 2-axle design. Additionally, these machines provided a retractable slanted boom. This style of retractable boom takes up much less space compared to a horizontal boom of the same size would.
Conventional Truck Crane
A mobile crane that has a lattice boom is a regular truck crane boom. This unit is lighter compared to the boom on a hydraulic truck crane. There are multiple boom parts that could be added to allow the crane to reach over and up an obstacle. A conventional truck crane needs separate power in order to move up and down, as it could not raise and lower utilizing hydraulic power.
Kangaroo Crane
A jumping crane is a different name for a kangaroo crane. This model is an articulated-jib slewing crane with an integrated bunker. These cranes started in Australia. They are usually used 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 using a long leg. This leg runs down the building's elevator shaft.