The mobile crawler crane is specific crane made with either a telescopic boom or a lattice boom. These move upon the crawlers tracks. Because this crane is self-propelled, it could move around particular work sites without the need for much set up. Because of their enormous size and weight, crawler cranes are rather pricey and even hard to transport from one location to another. The crawler's tracks offer the machinery stability and allow the crane to work without using outriggers, although, there are some models which do utilize outriggers. Additionally, the tracks provide the movement of the equipment.
Early Mobile Cranes
Originally, the very first mobile cranes were mounted to train cars and move along specifically designed short rail lines. When the 20th century arrived, the crawler tractor evolved and this brought the introduction of crawler tracks to the construction industry as well as the agricultural industry. Not long after, the crawler tracks were adopted by excavators and this further showcased the versatility of the machinery. It was not long after before crane companies decided that the crawler track market was a safe bet.
The Very First Crawler Crane
Northwest Engineering, a crane company in the USA, was the first to mount its crane on crawler tracks during the 1920s. It described the new machinery as a "locomotive crane, independent of tracks and moveable under its own power." By the mid-1920s, crawler tracks had become the chosen means of traction for heavy crane uses.
Developed by Charles and Ray Moore of Chicago, Illinois; the Moore Speedcrane was one of the first to attempt to copy rail lines for cranes. Made in Fort Wayne, Indiana, the Speedcrane was a steam-powered, wheel-mounted, 15 ton crane. During the year 1925, a company known as Manitowoc Shipbuilding Co, from Manitowoc, Wisconsin recognized the tracked crane's marketability and potential. They decided to team up with the Moore brothers so as to manufacture it and go into business.