... …..40X6, 40X8, 40X10,….90X6….Pitch of Load bearding flat bars(mm)12.5,15, 20, 30, 30.6, 32.5, 34 ... , 34.8, 35.3, 40, 60, 80……Pitch of cross bars(mm)38.1, 50, 50.8, 70, 75 ... type and square twisted type.1.5 Finishing treatment: Untreated (black self-color) 2. 11 sets of press welded (electro-forged ... can make grating customized according to site requirement. Steel Grating Black Panel