UGT provides a vast series of adjustment ring heights and diameters. This will allow the contractor to build a chimney structure to elevate the frame and cover to the desired surface.   Here's how it works. The contractor uses grade rings to take up the majority of the height. Then, for the top course use a finish ring to complete the elevation. Whether its a "rehab" or new build, the UGT system will make manhole elevation accurate, safe and pass the test of time and conditions.

34" Tech Data Sheet

36" Tech Data Sheet

40" Tech Data Sheet