Recently, a 30 inch custom manhole riser ring was designed and developed by J. Thomas, LTD. The application for the steel riser ring was to keep the exposed manhole from being covered up by the dirt embankment next to it.
Custom 30″ Manhole Riser Ring for embankment installation
The customer contacted J. Thomas, LTD. to discuss the special design and application.
J. Thomas developed the riser ring design (otherwise known as a Sewer Ring or Extension Ring) for approval and production. Typical manhole riser rings are 3 to 5 inches in height. This custom ring was fabricated using several standard rings to achieve a 30″H x 33″Diameter.
The project went through the production facility quickly and was shipped and installed within two to three weeks.
Custom manhole riser ring formed and ready for coating process
After the coating process is completed, the custom ring is ready for shipping to the job site
After shipping the 30inch manhole riser ring, the installation went smoothly on-site. The customer has future plans to put bollards around the extension ring and possibly paint it yellow for safety.