Specification - T1400-CB620 - 6in x 20in Catch Basin MIFAB Series T1400-CB620 6in wide x 20in long x 21in deep catch basin. Polypropylene body with integral top frame, anchor flange, grate lock down assembly, interlocking ends and radiused bottom. Standard with ANSI rated "Special Duty" lacquered ductile iron heel proof grates with a safe live load of over 10,000 lbs.