Drain stormwater in, keep leaves and debris out with the trench drain grate. The perforated grate features 0.25 in. holes that collects water into the channel. Also known as a drain cover, it has an NDS Class A load rating when properly installed (pedestrian traffic only). This galvanized steel grate is also ADA compliant and heel proof, with a surface area of 20.8 sq. in. per meter and flow rate of 64 GPM. Use two 1/2 meter (19.69 in.) grates to cover one BG-FILCOTEN 100 4 in. trench drain. Also available in a 1 meter (39.37 in.) size.