Bearing Bar

25x3, 25x4, 25x4.5, 25x5, 30x3,   30x4, 30x4.5, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10---100x10mm etc
 
  I bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etc
 
  US standard: 1''x3/16'', 1 1/4''x3/16'', 1 1/2''x3/16'', 1''x1/4'', 1 1/4''x1/4'',

1 1/2''x1/4'', 1''x1/8'', 1 1/4''x1/8'',   1 1/2''x1/8''   etc

Bearing Bar Pitch

12.5, 15, 20, 23.85, 25, 30, 30.16,   30.3, 32.5, 34.3, 35, 38.1, 40, 41.25, 60, 80mm etc
 
  US standard: 19-w-4, 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc

Twisted   Cross Bar Pitch

38.1, 50, 60, 76, 80, 100, 101.6,   120mm, 2'' & 4'' etc

Material   Grade

ASTM A36, A1011, A569, Q235,   S275JR, SS304, SS400,
 
  Mild steel & Low carbon steel, etc

Surface   Treatment

Black, self colour, hot dip galvanized, painted, spray coating

Grating   Style

Plain / Smooth, Serrated /teeth, I   bar, serrated I bar

Standard

China: YB/T 4001.1-2007,
  USA: ANSI/NAAMM(MBG531-88),
  UK: BS4592-1987, Australia: AS1657-1985,
  Germany: DIN24537-1-2006, Japan :J