A tower crane is a piece of equipment used to move or transport oversized objects. It is a stationary device, which means the base of the crane does move. A large, fixed tower supports a horizontal beam, or jib, which sits atop the tower to form an uneven letter “T.” A tower crane is often used in the construction industry to set steel beams and other large building components. It may also be used in the shipping or transportation industry to load and unload large freighters. 更多
