Gratings

FRP Molded gratings

Fiberglass Reinforced Plastic (FRP) is a plank shaped material cured in the matrix of unsaturated resins including isophthalic, orthophthalic, vinyl ester and phenolic, with reinforced frame of fiberglass roving through a special production process, with a certain rate of open meshes.

FRP Pultruded gratings

Fiberglass Reinforced Plastic (FRP) Pultruded gratings is manufactured by assembling two structural fiberglass shapes (cross and bearing bars) into a grid pattern. These bar shapes are made by a pultrusion – a continuous molding process utilizing glass or fibrous reinforcement in a polyester or vinyl ester resin matrix. Selected reinforcement materials like glass strands, mat or cloth are drawn through a resin where the material is thoroughly impregnated with a liquid resin. The fibrous laminate is formed to a geometric shape (T or l) and pulled through a heated steel die. The laminate solidifies into the exact shape of the die cavity as it is being continuously pulled by the pultrusion machine.

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