... 40,60mm 2>Cross bar pitch;50,100mm 3>Plain,Serrated,I-shape 4>Hot-dipped galvanized,Painted,Untreat ... dip galvanized , Painted , Untreated.3) Shape of bearing bars: Plain bar style , Serrated bar style , I Bar style4) Market: ... Bar (Load Bar) Specifications (mm):The specification of plain type and serrated type bearing bar is 20 x 3 ... get what you want! steel grating for construction(wholesale price)