- H-20 Wheel load rating: Heavy traffic including fork lift.- HDPE snap-together units. Includes trench, grate, snap-on end caps, and easy-out bottom drains for 2", 3", or 4" pipe. Comes completely assembled; ready to install.- Molded-in ribs for exceptional rigidity.- 235 PSI industrial strength- Grate complies with Americans with Disabilities Act.- Dimensions: 36' long x 5" high x 5" deep