... Plain Style Steel Grating, Serrated Style Steel Grating and I Bar Type Steel Grating. They are widely used ... mm etc, also be according to client's requirement and 30, 40, 60mm are recommended, America standard is ... 1 1/2'' x 1/4''(19-w-4), (11-w-4), (8-w-4) and so on.3) Cross Bar Pitch ... .6mm etc, also be according to client's requirement and 50, 100mm are recommended, America standard is available.4 ...