... airport etc. 1) Steel grating: Bearing bar size 32×5mm, bearing bar pitch 90mm, cross bar pitch 400mm and 100mm.Other kinds of ... ,30×4,30×5,32×3,32×5……45×5mmBeraing bar pitch12.5,15,20,25,30,35,40,50mmCross ... bar pitch38,50,80,100mmmaterialLow carbon steel, stainless steel, aluminumSurface treatmentUntreated, ...