Boom
The telescoping hydraulic boom-—made from high-tension steel five times as strong as construction girders—-can stretch 300 feet into the air (550 with extensions). Up to 4,500 feet of steel cables tie the whole system together.

Guying System
This Y-shaped mast provides stability, preventing the boom from bending in either direction as it shoulders the load. This also distributes the load and increases overall lifting power.

Monster Truck
To get around, the crane rolls on 18 tubeless, high-pressure tires, each one 4.5 feet wide. An eight-cylinder, 16.2-liter diesel motor puts out 680 horsepower, allowing it to drive on normal roads (sans boom) at up to 47 mph.

Outrigging
An X-shaped array of hydraulic beams extend away from the vehicle, plant their feet firmly, and lift the truck off the ground, forming what’s called a torsion frame. This distributes the weight evenly among the beams and prevents the crane from twisting under its enormous load.

Counterweights

A crane is all about balance, and balance means counterweighting. The crane body itself is a hefty counterweight; without the boom, the 11200 weighs 108 tons (that doubles when the boom is in place). But the crane also holds up to 445,000 pounds of counterweights—giant, 5- to 20-ton steel plates filled with scrap metal and concrete that are stacked on the truck’s back.

Steel Cables
These support the boom and direct the force down to the counterweights on the truck body.

Lattice Jib
This short, stiff extension contains a pulley that changes the direction of the rope. The jib is set at a slight angle. This gives the operator more maneuverability while keeping heavy loads (like a windmill generator) close to the boom’s tip, sending the weight down the boom and into the truck body, counterweights and outriggers.