FRP Grating is comparable with steel at the installed cost stage. Their low maintenance and long life means a significantly lower life cycle cost than that of steel and free from corrosion
Molded FRP grating is composed of alternating directional layers of continuous glass fiber for strength, with resin to consolidate the fibers, provide the shape and corrosion-resistance. Due to its bidirectional strength, molded grating can tolerate cutouts in the panel to allow pipe or equipment penetrations without requiring additional support around the opening. Molded grating has very high impact tolerance, as well as the highest chemical resistance of any fiberglass grating. It can be made slip-resistant by adding grit to the surface.
Pultruded FRP grating
consists of continuous glass strands encased in resin and wrapped in a surfacing veil which protects the fibers and allows resin to saturate the outermost part of the bar as well as penetrate between the glass fibers. This ensures a smooth and corrosion-resistant surface, with a higher glass/resin ratio than molded products. The individual bars are then assembled using cross bars and epoxy to mechanically join the load bars. Pultruded grating has unidirectional strength, with its much higher glass content resulting in a greater span capability than molded products. This product is usually specified in applications requiring larger spans or heavier loading.