Does your manhole need a top flange frame and drainage cover? You’ve come to the right place. Our custom top flange frame drainage covers are made of 3/8” thick ASTM-A36 carbon steel diamond plate, with 3/8″-thick gusset reinforcements stitch-welded underneath. Each drain slot is ½” wide.
Our top flange frame drain covers feature a nonskid surface and are rated for H-20 wheel loading under 25 mph. The heavy-duty steel frame of our top flange drain grates are all welded construction; it’ll last you for years to come!
Got any questions about our top flange frame and drainage covers? Want to request a custom quote? Please contact us today.