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Steel Grating
Product Definition:
Steel grating is a kind of open steel member which the bearing bars & cross bars are jointed at their intersections by welding or locking.
The continuous welding of each individual intesection point of the bearing bar and cross bar produces an extremely stable and hard-wearing structure. The cross bar normally used in the press press welded grating are twisted square wires, which are resistance welded to the bearing bars. This is carried out under high pressure using automatic resistance welding.
Hot DIP galvanized steel grating has four kinds of steel gratings, Flat(or Plain) Style Steel Grating, Serrated Style Steel Grating, I Bar Type Steel Grating and Serrated I Shaped 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.
Flat : the top surface of bearing bar is flat, which is the most extensively used in all kinds of application.
Serrated: standard grating has square-edge load bars, but where a higher slip resistance may required, serrated load bars should be considered.
I shaped bar: lighter, more economical and practical compared to flat one, improved strength while less in weight
Serrated I Shaped bar: optional, combined both advantages of lighter weight and anti-slip
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/T4001-1998
B) USA: ANSI/NAAMM (MBG531-88)
C) UK: BS4592-1987
D) Australia: AS1657-1985
E) Japan: JJS.
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