Grade rings and risers are precast concrete extensions installed with other components to raise the height of the overall structure to reach grade level. Contractors regularly use our extension accessories to ensure even access points at surface levels. We offer a variety of sizes for any adjustment in height.
Jensen Precast grade rings and risers are often used with the installation of manholes, including bell-up and spigot-up configurations. If your project requires a deep burial setting, ask one of our engineers or product experts how an extension can help solve for height issues.