A wheelbarrow is a small, hand-propelled cart designed to carry moderately sized loads. Its structure distributes the weight of comparatively heavy loads, allowing an operator to move loads that would be impossible to lift or maneuver without some type of assistive device. Wheelbarrows can be seen on construction sites and in gardens, among many other places, and most hardware suppliers stock them in a variety of shapes and sizes.
The basic design of the wheelbarrow has not changed very much over the centuries. It is made up of a deep tray or platform mounted on lightweight frame. One end of the frame has one or two wheels, while the other end has legs and a set of handles. When the wheelbarrow is in a resting position, the legs keep it upright; when it's in motion, the user lifts the legs up with the handles and pushes or pulls the load, with most of the weight balanced on the wheel rather than in the hands of the operator.