... galvanized steel grating factory 1.bearing bar pitch:30-60mm 2.cross bar pitch:50-100mm 3.surface processing: ... or hot dipped4.Specification:Bearing bar specification:20*3 to 100*6Bearing bar pitch:12.5,15,25 ... ,30,40,60mm etcCross bar picth:38,50,76,100mmChina standard: G203 ... requirement to produce.5.Characteristic:(1)high strength, (2)light structure, (3)good appearance(4)durable in ...