"City Crane" is a term used to define small 2-axle mobile cranes which could operate in compact spaces where the typical crane could not access. These city cranes are popular alternatives to be utilized through gated areas or in buildings.
City cranes were originally developed in the 1990s as a response to the increasing urban density in Japan. There are always new construction projects cramming their ways into the cities in Japan, making it necessary for a crane to have the ability to maneuver through the nooks and crannies of Japanese streets.
Basically, city cranes are small rough terrain cranes that are made to be road legal. These cranes are characterized by having a 2-axle design with independent steering on each axle, a slanted retractable boom, a single cab and a short chassis. The slanted retractable boom design takes up less space than a comparable horizontal boom would. Combined with the independent steering and the short chassis, the city crane is capable of turning in compact spots which would be otherwise unobtainable by other kinds of cranes.
Conventional Truck Crane
Traditional truck cranes are mobile cranes with lattice booms. This boom is a lot lighter boom than is found with a hydraulic truck crane boom. The many sections on a lattice boom are able to be added so that the crane can reach over and up an obstacle. Conventional truck cranes do not lower and raise their cargo using any hydraulic power and need separate power in order to move down and up.
Manitowoc made the first ever Speedcrane. It proved to be a successful machine although lots of adjustments had to be added later on. Manitowoc hired Roy Moore as a crane designer to help streamline the design. He understood the industry was changing towards internal combustion engines from original steam powered means and designed his crane to change with the times. The Speedcrane was redesigned for a gasoline engine.