A derrick is a type of lifting device that is often used in construction and industrial settings. It consists of a mast or tower that is held upright by guy wires or braces, and a boom that is hinged at the base. The boom can be moved to lift and move heavy loads vertically and horizontally.
Derricks are typically less mobile than cranes but are highly effective for lifting heavy loads to considerable heights. They are commonly used in shipbuilding, oil and gas industries, and power plants.