Manhole Rehabilitation Project

Rehabilitation of an existing concrete manhole, comprised of a fiberglass reinforced plastic lined concrete manhole flat top, FRP solid base liner (to be grouted in place), a polyvinyl chloride pipe riser section and all appurtenances. The PVC hybrid manhole rehabilitation system shall be corrosion, abrasion, inflow and infiltration resistant. B. The FRP-PVC hybrid manhole rehabilitation system shall be modular and shall include the following main components: 1) Fiberglass Reinforced Plastic (FRP) concrete protective liners for manhole base and top sections, including all appurtenances. Liners shall be non-structural units, constructed of fiberglass reinforced unsaturated polyester resin, third-party certified for wastewater infrastructure use, designed to provide a gastight and watertight homogenous barrier that protects the concrete manhole base and top sections from corrosion, abrasion, inflow and infiltration. 2) Concrete manhole top sections cast around the FRP concrete protective liners. Concrete top sections shall be ASTM C478 compliant. 3) PVC pressure pipe section shall be AWWA C900 compliant, DR-51 pressure class PVC pipe. 4) FRP Telescoping collar, grade rings, manhole ring and cover to grade, according to local jurisdictional requirements.

Division 03 -	Concrete, Precast Concrete.
Division 33 -	Utilities, Sanitary Sewerage Utilities, Sanitary Utility Sewerage Piping, Sanitary Utility Sewerage Force Mains, Sanitary Utility Sewerage Structures.