Installation recommendation-whenever possible, provided for a minimum of 1-1/2”(40mm) bearing support at all grating support points. Hold down clips should be used at the rate of one clip for every 6 square feet(0.56square meters) of grating minimum,or at least 4 clips for any square or rectangular piece, or at least 3 for a triangular piece. … Continue reading Installation Accessories for Molded FRP Grating