Molded fiberglass grating is a one-piece grating made of reinforced polyester or vinylester (FRP). It is available in standard panels and sizes. FRP grating is manufactured by interweaving continuous, thoroughly wetted fiberglass roving with thermosetting resin systems.

The components resin, fiberglass, additives and dyes are the basis of the composite FRP, which is very versatile in its form and practicability. The resin used determines the chemical resistance, flexibility and UV resistance of the FRP product. Depending on the application, different types of resins are used. FRP products can be made from orthophthalic resin, isophthalic and vinylester resin (with extremely high chemical load), Lichtgitter uses isophthalic resin as standard. The special feature of the phenolic resin is the high fire resistance and very low smoke production.
As a reinforcement, continuous glass filaments are woven in a plurality of layers. Additives such as flame retardants, hardeners, accelerators and UV stabilizers are further components. The standard color of the Lichtgitter FRP gratings is gray, similar to RAL 7035. Color pigments allow coloring of the FRP product. This results in various architectural design options or warning and signal designations.

The numerous possible applications include floor systems, walkways, work platforms, stairs, ramps, trench covers and catwalks. There are plenty of industries that fiberglass-gratings can be used in, for example oil/gas, mining/smelting/refining, food processing, beverage, chemical processing, water and wastewater treatment, metal finishing, pulp/paper, transportation, pharmaceutical and textile.