Heavy equipment refers to heavy-duty
vehicles, specially designed for executing
construction tasks, most frequently ones involving
earthwork operations. They are also known as
heavy machines,
heavy trucks,
construction equipment,
engineering equipment,
heavy vehicles, or
heavy hydraulics. They usually comprise five equipment systems: implement,
traction, structure,
power train, control and information. Heavy equipment functions through the
mechanical advantage of a
simple machine, the
ratio between input force applied and force exerted is multiplied. Some equipment uses
hydraulic drives as a primary source of motion.