grade ring

grade ring

A precast concrete ring at the top of a manhole; used to adjust the top of the manhole so that it is set at the proper angle.
References in periodicals archive ?
The three-piece Horizontal Grade Ring Battery Form with Rollback Core, unveiled at the 2019 Precast Show, can be customized to individual plant requirements.
F-180 can also be used for replacing missing mortar joints in precast manholes or replacing mortar at the grade ring.
"First." he said, "the standard concrete grade ring is placed over the manhole opening.
It usually takes four men to lift a concrete grade ring, which can result in possible injury; however, a 6-inch PRO-RING weights only 14 pounds and eliminates that hazard, helping to reduce worker injuries.
For $199.99 more, you can upgrade to the Pro Kit: Hawke XB-11.5-5x32 SR etched-reticle, variable-speed, two-color illuminated scope with match grade rings; three 19-inch Mission bolts with nocks; 3-bolt quiver and rail lube.
Contract Awarded for Concrete Grade Rings & Pre-Cast Manhole Sections
Eull's Manhole Shield incorporates concrete grade rings, underground mortar, masonry shim strips and an impermeable l-and-l barrier in a single package, ensuring that installation is correct the first time and requiring less ongoing maintenance.
The system incorporates concrete grade rings, underground mortar, masonry shim strips and an impermeable barrier, promoting proper installation and reducing routine maintenance.
These existing problems have been directly related through broken concrete, mortar, and brick mortar grade rings. CMOM has mandated an NPDES permit requiring that the materials used in the infrastructure shall be of the quality to eliminate I&I.
The seals can also allow for grade change leveling without the need for grade rings, gaskets, bricks or anchor bolts.
An absolute bond seals between frame and grade rings or frame and cone.
When necessary, grade adjustments are made with pressure-testing grade rings. Once cement work has cured, the structure is ready for encapsulation.