... , Trench Covers, Assembly Lines, Stairs, Gully Covers, Jetties, floo 12.6 to 63mm thick Fiberglass grating FRP grating, GRP gratingACME Fiberglass ... protection and safety are your goal.StabilityExpansion and contraction is 24% and 50% less than aluminum and steel, providing greater dimensional ... *50(2")25x25(1"x1")50x50(2"x2")V 12.6 to 63mm thick Fiberglass grating FRP grating, GRP grating