Fiberglass Grates

Fiberglass grating can be molded into large sheets for later fabrication into smaller, custom shapes. Mesh grating is made by laying fiber reinforcing materials in grid work-shaped mold and bonding them with polyester or vinyl ester resins. Other resins are available for special applications. The molded product is ground to the desired thickness and flatness. Slip-resistant coatings are applied to the surface at this time if required. Trench Drain Systems offers the following molded fiberglass grating products.

Pultrusion is a fiberglass forming process whereby reinforcing fibers are pulled through an extrusion die while vinyl ester polymer resins are extruded under pressure. The act of “pulling” fiber while “extruding” resin leads to the term “pultrusion”. Fiberglass shapes made by this process come in long, continuous shapes. In the case of fiberglass grating, the shapes have cross-sections akin to rectangular bars, tees and I’s. To make bar grating, these long bars are assembled parallel to each other and connected by structural cross members (known as tie bars) on 6″ spacing. A non-slip coating is applied to the grating after assembly.