Protect your drainage system by preventing harmful leaves and debris from entering the drain with the trench drain grate. The definitive design features rounded slots that encompass the grate from end to end. This galvanized steel drain cover has an NDS Class C load rating when properly installed and is ADA compliant. Grate has a surface area of 42.6 sq. in. per meter and 131 GPM flow rate. One 1-meter (39.37 in.) grate covers one BG-FILCOTEN 100 4 in. trench drain; also available in a 1/2 meter (19.69 in.) size.