A small 2-axle mobile crane, known as a City crane is designed for use within compact areas where the usual cranes could not venture. City cranes are used to work in buildings or to travel through gates. In the 1990s, City cranes were developed as an answer to the growing urban density in the country of Japan. Many cities in the country began building and cramming more structures near each other and it became necessary to have a crane that was capable of navigating through the tiny spaces of Japanese streets.
Basically, the city crane is a small rough terrain crane. This crane is designed to be road legal and is characterized by a short chassis, a single cab, the 2-axle design and independent steering on each axle. In addition, these equipments provided a slanted retractable boom. This kind of retractable boom takes up much less space than a horizontal boom of comparable size would.
Regular Truck Crane
A mobile crane that has a lattice boom is a regular truck crane boom. This model is lighter than the boom on a hydraulic truck crane. There are many boom sections that could be added to enable the crane to reach up and over an obstacle. A regular truck crane needs separate power to be able to move down and up, as it could not raise and lower using hydraulic power.
A kangaroo crane or jumping crane is a articulated-jib slewing crane that is designed with an integrated bunker. These cranes were initially developed within Australia. They are usually utilized in high-rise construction projects. Kangaroo cranes are different within the industry in the way that they could raise themselves as the building they are working on increases in height. These specific cranes are anchored by a long leg. This leg runs down the building's elevator shaft.