High Impact Resistance
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2025-08-15 05:26
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National Grating Fiberglass Trench and Drain Grates are available in two standard resin systems. Each providing different levels of corrosion protection. Both resin systems meet Class 1 Flame Spread Rating per ASTM E-84 test standards.
Molded fiberglass grating is manufactured in a one-piece construction process by interlacing pre-wetted glass reinforcing strands in a liquid resin matrix within a given configuration. Once the resin matrix has cured, the molded grid is removed from the mold. The one-piece construction ensures that all glass is impregnated with resin.