F-plain Flooring Grating bearing bar pitch:12.5-100mm cross ... bearing bar:25*3mm,30*3mm,30*5mm,50*5mm F-plain Flooring GratingMaterial: Mild Steel (Low Carbon Steel) or Stainless ... x 4, etc.Bearing bar pitches may be 12.5,15,20,22,25,30,34,40,60,80and 90mm,100mm ... 100mm are recommended.Sign of the shape of bearing bars:F-plain style(may be committed in the symbol of steel ...