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