These specifications are based on electric motors and on processing gravel. Ample horsepower is provided to handle the material set forth in these specifications. A high percentage of the maximum sized material or crushed stone will reduce the plant capacity. Customarily the log washer tubs are operated at an angle between 6° and 10°. These capacities are rated at a slope of 8°. Increasing the tub slope beyond our standard 8° will reduce the tonnage capacity.