Specification - T1320-FL - 6" Wide Trench Drain System MIFAB T1320-FL Series 6" wide modular trench drain with lacquered cast iron body sections, bottom outlet (specify connection type) and anchor flange. Assembled in 20" long module sections with standard ANSI rated "Special Duty" lacquered ductile iron grates with a safe live load of over 10,000lbs.