Channel and Trench Drain system is engineered to deliver the most flexibility in a heavy duty design. The Polylok Heavy Duty Trench Drain is H-20 wheel load rated when cast in reinforced concrete (as per Polylok Trench Drain H-20 Instruction Diagram). It offers a modular design with interlocking components to enable quick and easy connections. Each segment is 4 feet in length and comes with a reversible ADA compliant grate that can either be flat or allow for a 3/16" convex surface.