Specification - P6120 - 12in Wide Heavy Duty Stainless Steel Trench Drain MIFAB series P6120 - 12in wide heavy duty sectional trench drain constructed of 14 gauge, Type 304 stainless steel complete with anchor flanges, radiused bottom and 1/8in slope per 1 ft. of length. Free area of 15 square inches per 1 ft. section. Standard with ANSI rated "Heavy Duty" slotted Type 304 stainless steel grates with a load rating of 5,000 to 7,500 lbs.