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2025-08-14 19:51
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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.

  • Lightweight Materials: The FRP grating is light in weight, with a specific gravity of only 1.9, which is equivalent to 1/4 of that of steel. Therefore, the transportation cost is lower and the installation speed is faster.