dumping car

Dumping cars are used in constructing and ballasting railroads, excavating and filling in, canal and dock building, for carrying ores, . The car has shutters in the bottom which are allowed to fall when a bolt or button is withdrawn. The tilting car has a bed secured by a longitudinal bolt to the frame, and may be tilted sideways so as to discharge its load over the wheels outside the track. Hooks retain the bed in a level position till the car reaches the place to dump the gravel. Dumping-cars are made to discharge at end or side, or to swivel and dump in any direction. The load is about 21⁄2 cubic yards.