Comedil Construction Cranes San Francisco

Crawler Crane

The mobile crawler crane is particular crane made with either a telescopic boom or a lattice boom. These move upon the crawlers tracks. Since this crane is self-propelled, it can move around certain work locations without the need for much set up. Due to their huge weight and size, crawler cranes are rather costly and even hard to transport from one location to another. The crawler's tracks provide stability to the machine and allow the crane to function without using outriggers, although, there are several models which do use outriggers. Also, the tracks provide the machine's movement.



Early Mobile Cranes

The very first mobile cranes were originally mounted to train cars. They moved along short rail lines which were specifically constructed for the project. Once the 20th century arrived, the crawler tractor changed and this brought the introduction of crawler tracks to the agricultural industry as well as the construction industry. Not long after, excavators adopted the crawler tracks 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 First Crawler Crane

In the 1920s, Northwest Engineering, a crane company in the USA, mounted its very first crane on crawler tracks. It described the new equipment as a "locomotive crane, independent of tracks and moveable under its own power." By the middle part of the 1920s, crawler tracks had become the chosen means of traction for heavy crane uses.



The Speedcrane

Developed by Charles and Ray Moore of Chicago, Illinois; the Moore Speedcrane was amongst 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 1925, a company referred to as Manitowoc Shipbuilding Co, from Manitowoc, Wisconsin recognized the tracked crane's marketability and potential. They decided to team up with the Moore brothers in order to produce it and go into business.

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