... of steel grating 4.reasonable price Description of serrated steel grating,flooring grating,drain cover,trench cover, ... 3 to 60 x 62. Bearing bar pitch:12.5,15,25, 30, 34,40, 60mm etc., ... 1985Grating Dimension Bearing bar pitch(mm)12.5, 15,25, 30, 30.16, 32.5, 34, 40, 41.25, ... fences,framedgrates,trash rack grates ,paint backing chambers…… serrated steel grating,flooring grating,drain cover,trench cover, ...