steel grating 1.Q235,hot dipped galvanized 2.25/3 32/5 25/5 100/10...etc bearing bars 3. 6, 8,10mm ... 100*6Bearing bar pitch:12.5,15,25,30,40,60mm etcCross bar picth:38,50,76,100mmChina standard: G203/30/100, G203/40/100 ... , G325/30/100, G325/30/50, G325/40/50, etc. We also can ...