Terex Tower Cranes Austin

Early Crane Evolution

The very first recorded concept or type of a crane was used by the early Egyptians more than 4000 years ago. This device was called a shaduf and was utilized to transport water. The crane was made out of a pivoting long beam that balanced on a vertical support. On one end a bucket was connected and on the other end of the beam, a heavy weight was attached.



During the first century, cranes were built to be powered by animals or humans that were moving on a treadmill or a wheel. These cranes had a long wooden boom called a beam. The boom was attached to a rotating base. The treadmill or the wheel was a power-driven operation that had a drum with a rope which wrapped around it. This rope additionally had a hook which lifted the weight and was connected to a pulley at the top of the boom.



Cranes were used extensively throughout the Middle Ages to build the huge cathedrals in Europe. These devices were also used to load and unload ships in main ports. Over time, significant developments in crane design evolved. For example, a horizontal boom was added to and was called the jib. This boom addition allowed cranes to have the ability to pivot, thus greatly increasing the machine's range of motion. Following the 16th century, cranes had incorporated two treadmills on each side of a rotating housing which held the boom.



Cranes used humans and animals for power until the mid-19th century. This all changes quickly when steam engines were developed. At the turn of the century, electric motors and IC or internal combustion engines emerged. Cranes also became designed out of steel and cast iron rather than wood. The new designs proved more efficient and longer lasting. They could obviously run longer also with their new power sources and thus carry out bigger tasks in less time.

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