Weighbridge n. : A weighing machine on which loaded carts may be weighed; platform scales.

Example:
if a lorry full of birds on a Weighbridge and they all fly off their perches does it weigh more, same or less

Taxonomy
truck scale, vehicle, axle, scale, weigh bridge, weighbridges, free encyclopedia, pit, vehicle weights, trucks, weigh, platform, gross vehicle, vehicle weight, the bridge, weighing equipment, levers, portion.

Defination from the web:
Weighbridge) Jump to: navigation, search. A weigh bridge at a gravel pit. The weigh bridge is the two part platform over which trucks are driven. ... A moveable weigh bridge ... the arrangement of levers underneath the weigh bridge since the response of the scale ...