City Cranes
The city crane is a small 2-axle mobile crane that is designed to be used in tight areas where other cranes could not go. The city crane could work in between buildings and can travel through gates. In the 1990s, City cranes were developed as an answer to the increasing urban density in the country of Japan. Many cities within the nation began cramming and building more structures near each other and it became necessary to have a crane that was capable of navigating through the small areas of Japanese roads.
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, the 2-axle design and independent steering on each axle. Furthermore, these types of machinery offered a retractable slanted boom. This type of retractable boom takes up much less space than a horizontal boom of similar size would.
Conventional Truck Crane
A mobile crane that has a lattice boom is a typical truck crane boom. This unit is lighter than the boom on a hydraulic truck crane. There are multiple boom sections that are able to be added to enable the crane to reach over and up an obstacle. A typical truck crane needs separate power in order to move down and up, since it could not lower and raise using hydraulic power.
Kangaroo Crane
A jumping crane or a kangaroo crane is a articulated-jib slewing crane that is made with an integrated bunker. These cranes were initially developed within Australia. They are usually used in high-rise construction projects. Kangaroo cranes are unique within the industry in the way that they are capable of raising themselves as 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.