... high quality 3.prompt delivery time hengzhou 's steel grating can be used for ladders ,ditch grates ,filter ... grate ,stair treads and flooring grating ect .The plain galvanized platform grating commonly used on bridge,refinery ,power ... bar can be plain, serratted and I bars.Grating Dimension Bearing bar pitch(mm)12.5, 15, ... ,trash rack grates ,paint backing chambers…… grating fence&metal fence