OO-C-2868 Central Mix Plant, Concrete, Mobile 100 Cubic Yards \(77 Cubic Meters\) Per Hour CapacityThis specification covers a complete central mix concrete plant in a single mobile unit, electric-driven, with automatic controls, capable of producing not less than 100 cubic yards \(yd3\) or 77 cubic meters \(m3\) of concrete mix per hour when accompanied with a mobile mixer unit.