1) Bearing Bar (Load Bar) Specifications (mm): The specification of plain type and serrated type bearing bar is 20 x 3 to 100 x6;the specification of I-section type is 25 x 5 x 3, 32 x 5 x 3, 38 x 5 x 3, 40x 5 x 3, 50 x 5 x 3, 50 x 7 x 4, 55 x 7 x 4, 60 x 7 x 4, 65 x 7 x 4, 70 x 7 x 4,
75 x 7 x 4, etc.

   2) Bearing Bar Pitch (center to center): 12.5, 15, 30, 34, 40, 60mm etc, also be according to client's requirement and 30,40, 60mm are recommended, America standard is available.

   3) Cross Bar Pitch (center to center): 38, 50, 76, 1001 101.6mm etc, also be according to client's requirement and 50, 100mm are recommended, America standard is available.

   4) Material: Mild Steel (Low Carbon Steel) or Stainless Steel

   5) Surface Treatment: Untreated, Painting or Hot dip Galvanizing

   6) Steel grating standards: A) China: YB/T4001-1998 B) USA: ANSI/NAAMM (MBG531-88) C) UK: BS4592-1987 D) Australia: AS1657-1985 E) Japan: JJS

Stair treads,stair grating,ladder steps,steel grating.