Cranes: how lifting machines changed construction

A crane is a machine that lifts heavy loads and moves them where people need them. This site follows the story of cranes in construction, from muscle-powered machines in the ancient world to the computer-assisted giants on today's building sites.

Why cranes matter

Before cranes, builders could only raise stone, timber and metal with ramps, levers and large teams of workers. A crane lets a few people lift a load far heavier than they could manage alone, and place it with care at height. Tall buildings, long bridges, ports full of cargo and wind turbines all depend on this ability.

What you will find here

• Ancient and medieval cranes: Greek and Roman machines, treadwheels and cathedral building.
• Industrial Revolution: steam, hydraulic and electric power arrive.
• Modern cranes: tower, mobile and crawler cranes and what each is for.
• Technology milestones: a timeline in date order.
• Today and tomorrow: safety systems, automation and electrification.

The big idea

Every crane, old or new, is a way of multiplying force. Pulleys, levers, gears and, later, engines and hydraulics let a small effort move a large weight. The story is one of better ways to do that, step by step.