The advanced ergonomic aspects of composite manhole covers and frames help to safeguard the municipal workforce from injuries.Structurally GMI composite manhole systems perform well in excess of AASHTO H-20/25 standards, with 100,000 lb ultimate load performance, and can be engineered for the extreme loading applications. 

GMI was the first company in the United States to design and manufacture a composite manhole cover for the utility and petroleum markets, and has been proudly manufacturing top quality composite access covers in the USA for the last 20 years.  GMI is number one in the market, supplying fiberglass reinforced composite covers to utilities and municipalities across the country.  Field performance has proven that composite manhole covers are ideal for the most challenging environment.  Be sure to ask for GMI Composite Access Covers by name, the safest, strongest and lightest manhole cover and frame system.

Patented design features and advanced fiber reinforced polymer (FRP) material technology make GMI composite products strong, lightwieght and safe for everyone. Safety for both pedestrians and utility employees has driven GMI to produce the safest manhole cover possible. Composite manhole covers will conduct neither stray voltage nor high heat shielding pedestrians from the underground environment.

Composite manhole cover and frame systems

Fiber, CATV, Telephone, Utility Pedestals

NEMA Rated Junction Boxes

HDPE Plastic Vault Assemblies
High Density Poly Ethylene (HDPE) Vaults, Handholes and Asscoated Covers and Accessories. Also available in polymer-concrete

Polymer Concrete Vaults & Covers
Polymer Concrete Handholes and Vaults with Associated Covers, Logos, Racking Hooks and Accessories

Vaults & Enclosures