... of walkway grating,drain cover,trench cover,steel grating,stair tread,steel grating,plain steel grating,galvanized gratingThe walkway grating commonly used ... of bearing bar can be plain and serratted.Grating Dimension Bearing bar pitch(mm)12.5, 15 ... grates ,paint backing chambers…… walkway grating,drain cover,trench cover,steel grating,stair tread,steel grating,plain steel grating,galvanized grating