Terex Tower Cranes Houston

Early Crane Evolution

More than 4000 years ago, early Egyptians created the first recorded kind of a crane. The original device was referred to as a shaduf and was first used to transport water. The crane was made out of a long pivoting beam that balanced on a vertical support. On one end a heavy weight was attached and on the other end of the beam, a bucket was connected.



Cranes which were made during the first century were powered by animals or by humans that were moving on a treadmill or a wheel. The crane consisted of a long wooden beam that was called a boom. The boom was attached to a base which rotates. The treadmill or the wheel was a power-driven operation which had a drum with a rope which wrapped around it. This rope also had a hook which was connected to a pulley at the top of the boom and lifted the weight.



Cranes were used extensively in the Middle Ages to make the enormous cathedrals within Europe. These devices were also used to load and unload ships in main ports. Over time, major developments in crane design evolved. For instance, a horizontal boom was added to and became known as the jib. This boom addition allowed cranes to have the ability to pivot, hence really increasing the range of motion for the machine. After the 16th century, each side of a rotating housing that held the boom incorporated two treadmills.



Even until the mid-19th century, cranes continued to depend on animals and humans for power. When steam engines were developed, this all rapidly changed. At the turn of the century, Internal combustion or IC engines as well as electric motors emerged. Cranes also became designed out of cast iron and steel as opposed to wood. The new designs proved longer lasting and more efficient. They could obviously run longer too with their new power sources and therefore carry out bigger tasks in less time.

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