Special Plate Punchings shall include clean, dry, uniform plate punchings suitable for ballast material or high density furnaces charging. Material must be free flowing and no piece shall be larger than 2" in any direction and a minimum of 1/4" in any direction. May be any shape provided that there are no protruding edges. All Steel Mill Scrap grades are based on prepared mill specifation grades in minimum truck~lot~load quantities (20 Ton).