1)steel grade: Q235B 2)fast service and delivery on schedule 3)application:industrial platform, staircases, ... , 40*5,50*5,65*5,75*6, 75*10,85*10,95*10, 100*10mm 2 Bearing Bar Pitch 12.5,15,20 ... Cross Bar Pitch 38.1,40,50,60,76,80,100,101.6,120mm 4 Grating Style smooth, teeth, I bar ...