Channels are 120" long, 12" wide reveal and have a 9-1/4" throat. Modular channel sections are made of Fiber Reinforced Polymer (FRP), and have a positive mechanical connection between channel sections that will not separate during the installation. Channels weigh less than 5.05 lbs. per linear foot, have a smooth, 3" radiused self cleaning bottom with a Manning’s coefficient of .009 and 1.04% or neutral 0% built in slope. Channels are provided with standard DGC grates that lock down to frame. Zurn 12" wide reveal Ductile Iron Slotted Grate conforming to ASTM specification A536, Grade 80-55-06. Ductile Iron grate is rated Class C per the DIN EN 1433 top load classifications. Supplied in 24" nominal lengths with 13/16" wide slots, and 1-1/2" bearing depth. Grate has an open area of 86.7 sq. in per ft. The #7 gage thick Heavy-Duty Carbon Steel Frame Assembly conforms to ASTM specification A36. Frames shall mechanically lock into the concrete surround at a maximum spacing of every 21", with 14 anchors per 120". Frames have rebar attachment brackets as standard to secure trench to its final location. Grate lockdown bars are to be integral to the frame. The frame is supplied with a powder coated finish. All welds must be performed by a certified welder per ASTM standard AWS D1.1. Frames and Channels are produced in the U.S.A.
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