The pultruded grating product is a mostly mechanized process. Fiberglass of different shapes such as: strand, mat and veil are pulled through a liquid resin bath and a heated die where the bar is shaped and the resin is cured. These pultruded bars can be cut into 12 ft, 15 ft or 20 ft lengths. The bars are then taken to a workstation and drilled (6" or 12" on center) on the sides to accept the crossbars. The drilled bars are spaced proportionally for the width of the panel; 3 ft, 4 ft or 5 ft. The final step is to seal the entire cross bars and holes with corrosion resistant epoxy resin.