City Cranes
The term "City Crane" refers to a small 2-axle mobile crane that is designed to be used specifically in compact areas where standard cranes can not venture. These city cranes are popular choices for use through gated places or in buildings.
In the 1990s, city cranes were originally developed in response to the growing urban density within Japan. There are continually new construction projects cramming their ways into Japanese cities, making it necessary for a crane to have the ability to steer through the nooks and crannies of Japanese streets.
Essentially, city cranes are small rough terrain cranes which are made to be road legal. These cranes are characterized by having a 2-axle design with independent steering on each axle, a single cab, a short chassis and a slanted retractable boom. The slanted retractable boom design takes up much 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 unaccessible by other kinds of cranes.
Conventional Truck Crane
Conventional truck cranes are mobile cranes with lattice booms. This boom is much lighter boom than is found with a hydraulic truck crane boom. The many sections on a lattice boom could be added so that the crane could reach over and up an obstacle. Conventional truck cranes do not raise and lower their cargo utilizing any hydraulic power and need separate power to be able to move down and up.
Manitowoc built the first ever Speedcrane. It proved to be a successful device though a lot 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 moving towards internal combustion engines from original steam powered methods and designed his crane to change with the times. The Speedcrane was redesigned for a gasoline engine.