... pitch apart,by welding with 200-ton hydraulic resistance automatic welding equipment,then cutting,punching and banding ends .1 ... appearance,bright surface 4.No dirt-rain-snow deposit,automatic cleaning,eay maintenance5.Good ventilation,day-lighting,heat-dispersing ... ,environmental ingineering .Steel grating pictures:Steel grating application: High quality ISO certified Stainless Steel Grating (FACTORY)