Heavy Duty Steel Grating 1. Bearing bar pitch:30,40,60mm 2 ... pitch: 50,100mm 3.Type:Plain,Serrated,I-shape Heavy Duty Steel Grating 1. Material: stainless steel plate 2. Surface ... as the platform, walkway, bridge, building groove, covers, ladders, fences, guard rails and so on.5. Specifications:SeriesPitch of Bearing barCross ... /60/50G505/60/50G555/60/50G605/60/50 Heavy Duty Steel Grating (manufacturer)