A stilt floor is a partly covered parking spot on a business or residential building's ground level. Its height varies between 2.4 and 2.7 meters. A stilted floor is supported by pillars and has four open sides. It generally has a generator room, a switch room, a society and information room, and so on. The word comes from the Swedish language and means "to stand in". This type of floor provides additional space on which to place vehicles, especially those that are taller than typical cars. They are usually found on buildings over three stories high. Stilt floors are commonly used in Europe for parking delivery trucks. Because they can be raised up above street level when not in use, they reduce congestion in cities during rush hour and avoid blocking access ramps or elevator pits. Delivery drivers use hand-operated levers inside their trucks to raise or lower the floors as needed. When driving off, the trucks lift the stilts so they don't interfere with other traffic or have to be pushed out of the way.