Shield Pedestrians from Underground Hazards

Block Stray Voltage - The advanced composite materials featured in the construction of GMI composite manhole covers are deployed globally in high voltage electrical insulating applications. 

GMI fiberglass reinforced polymer products act as electrical insulators protecting pedestrians and their pets from the possibility of accidental electrical shock. Urban streets and sidewalks are shielded against stray voltage within an underground electrical vault and cover.

Insulate Extreme Heat - GMI composite manhole systems do not conduct heat. In the event that the environment beneath a manhole cover becomes super heated - steam tunnels for example - the composite manhole cover will not allow that heat to transfer to the surface of the cover. The composite manhole cover acts as an insulator; protecting pedestrians from the possibility of severe burns. 

Non-Slip - GMI Covers feature a slip resistant, nonskid surface pattern that protects pedestrians from accidental slip and/or fall events. 

Create More Attractive Cityscapes 

Reduce Noise Pollution - The clanging of mal-set metallic covers is silenced by the use of GMI composite manhole covers. Severe problem areas can be silenced by incorporating an elastomeric spacer into the composite manhole cover. 

Reduction of Malodors – Utilizing a clamping manhole cover retention system GMI seals unpleasant sewer odors beneath street level and away from pedestrians. 

Create a Civic Identity – Custom logos, lettering, and crests can be incorporated into GMI products. Color matching of local university and high school spirit colors is also available.  GMI Badge Insert Cover