Introduction of hot dip galvanized steel grating Bearing bar - A flat bar withstanding the main load is in consistent with the span direction . bearing bar pitch - the distance center to center of the two bearing bars. Cross bar - the connecting bars , made from twisted bar ,round bar or flat bar, which extend across the bearing bars Cross bar pitch - the distance center to center of the two adjacent cross bars. Length (span)- the maximum dimension of a grating panel ,measured parallel to the bearing bar ,and in the same direction as the bearing bars . Width - the maximum dimension of a grating panel ,perpandicular to the bearing bars .and in the same direction as the cross bars. Width - the maximum dimension of a grating panel ,perpandicular to the bearing bars .and in the same direction as the cross bars.