Fiberglass reinforced plastic (FRP) grating is manufactured by combining a matrix of resin and fiberglass. That makes it a composite material. Fiberglass grating does not corrode like steel gratings. That is what gives them their value. They are used in corrosive environments. They lower maintenance costs.
Molded grating is made in a mold. Pultruded grating made by joining pultruded profiles into the shape of a grating.
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