City Cranes
"City Crane" is a term used to define small 2-axle mobile cranes which could operate in tight spaces where the typical crane could not access. These city cranes are great alternatives for use inside buildings or through gated areas.
City cranes were initially developed in the 1990s as a response to the increasing urban density in Japan. There are continually new construction projects cramming their ways into Japanese cities, making it necessary for a crane to have the ability to navigate the nooks and crannies of Japanese streets.
Essentially, city cranes are small rough terrain cranes which are built to be road legal. These cranes are characterized by having a 2-axle design with independent steering on each axle, a short chassis, a slanted retractable boom and a single cab. 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 that would be otherwise unobtainable by other crane designs.
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 can be added so that the crane can reach up and over an obstacle. Conventional truck cranes require separate power to be able to move down and up and do not raise and lower their cargo using any hydraulic power.
Manitowoc built the first ever Speedcrane. It proved to be a successful machine though many adjustments had to be added later on. Manitowoc hired Roy Moore as a crane designer to help streamline the design. He knew 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.