Sources for Composite Grade Rings for Fiberglass Packaged Metering Manholes

H-20 traffic manhole with frame, cover, and composite grades rings Many times, customers who opt to use a fiberglass Packaged Metering Manholes want to a have a full composite installation. For traffic applications this means that composite grade rings are needed to set the frame / cover over the manhole.

To assist you in tracking down suppliers of these grade rings, we’ve put together a list of companies that can assist you:

When used with a composite frame and cover system over an Openchannelflow traffic rated Packaged Metering Manhole, these manhole grade rings provide a top-to-bottom, long-lasting, and corrosion resistant installation.