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Crane used on construction sites with a usually horizontal jib mounted on top of a tower.
Metal lattice that supports the ballast.
Cab at the top of the tower from which the operator manipulates the crane.
Metal lattice of varying height that supports the jib.
Blocks of concrete stacked at the base of the tower to stabilize the crane.
Girders along and under which the trolley runs.
Strong curved piece of metal for suspending the load.
System of pulleys that work with the trolley pulley to improve leverage to lift heavy loads.
Durable cable of variable length for manipulating loads.
System of several pulleys that together enhance leverage.
Metal lattice that pivots on the tower and lifts and extends the hoisting system.
Vehicle running along and under the jib; the hoisting rope is suspended from it.
Metal cable that distributes the tension.
Concrete mass attached to the counterjib to balance the weight of the jib and its load.