Crane (machine)

A crane is a lifting machine that has hoists, wire ropes and sheaves on it. It can be used both to raise and lower things or to move them left and right. Cranes are often used in the construction industry (building houses or buildings) and in creating or moving heavy things.

A tower crane with a pivoted main boom

Other websites

• Knots, hitches and bends Archived 2007-01-07 at the Wayback Machine
• VRML Simulation of an Excavator, Tower Crane, and Dumptruck Archived 2007-12-14 at the Wayback Machine