Introduction of Welded Bar Grating
Hot dip galvanized steel grating has three kinds of steel gratings,
they are Plain Style Steel Grating, Serrated Style Steel Grating
and I Bar Type Steel Grating. They are widely used in steel
structure platforms, stair treads, sidewalks, drainages and well
covers etc. We can design and manufacture standard steel grating
and in customized shapes per client's requirements.
1) Bearing Bar (Load Bar) Specifications (mm):
The specification of plain type and serrated type bearing bar is 20
x 3 to 100 x 10; The specification of I-section type is 25 x 5 x 3,
32 x 5 x 3, 38 x 5 x 3, 40 x 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, 25, 30, 30.16, 32.5, 34, 40, 41.25, 45, 50, 60, 60.32,
80, 100 mm etc, also be according to client's requirement and 30,
40, 60mm are recommended,
America standard is available <1'' x 3/16'', 1 1/4'' x 3/16'',
1-1/2'' x 3/16'', 1'' x 1/4'', 1-1/4'' x 1/4'', 1 1/2'' x
1/4''(19-w-4) and so on.
3) Cross Bar Pitch (center to center):
38.1, 40, 50, 60, 76, 80, 90, 100, 101.6, 102, 135mm and so on
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/T4001-2007
B) USA: ANSI/NAAMM (MBG531-88)
C) UK: BS4592-1987
D) Australia: AS1657-1985
E) Japan: JJS.
