In Packaged Metering Manholes, when used with our molded diamond plate surface, recessed grating creates a safe, stable working environment for the operator to work from.
Fiberglass pultruded grating also facilitates the direct flow of car wash water into the trench. There is no water in the car wash working position, and the FRP grille has a strong load-bearing capacity. It can be applied in car washes, urban greening, shipyards, and sewage treatment plants.