... ,40,60mm 2.Cross bar pitch;50-100mm 3.Plain, I-shape, Serrated 4.Galvanized, Black, Steel Grating Size fields:1 ... 20 x 5 to 75 x 8mm;the specification of I-section type is 25 x 5 x 3, 32 x ... plant, water plant, defense project, chemical factory and so on. Welded Bar Grating