wheelbarrow

A wheelbarrow is a small hand-propelled vehicle used to transport loads. It consists of a trough or tub mounted on a frame with a single wheel at the front and two handles at the rear. The user lifts the handles and walks forward, letting the wheel bear much of the load's weight, which reduces lifting effort compared with carrying by hand.

Design and variants: The most common form has one wheel, a tub made of steel, aluminum, or wood, and a metal or wooden frame. Some models have two wheels for greater stability, especially on uneven ground or when transporting long items. Wheels may be pneumatic or solid; frames may be steel or wood. Balance and load distribution depend on the position of the wheel and the operator's stance.

History: Wheelbarrows appear in ancient times and have been used in Europe, Asia, and the Middle East for centuries. Early examples are associated with Greco-Roman and Chinese engineering traditions. The single-wheel design became common in horticulture and construction in the medieval and early modern periods.

Uses and materials: Commonly used for gardening, landscaping, farming, and construction work. Trays range from shallow to deep, suited to the material being moved. Maintenance includes checking the tire, bearings, and fasteners, and lubricating the axle.

Operation and safety: Load near the wheel; keep a low center of gravity; lift with the legs; avoid overloading; be mindful of tipping hazards and uneven terrain.