Serrated Black Steel Grating for Floor
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Hot DIP galvanized steel grating has three kinds of steel gratings, they are Plain Style Steel Grating, Serrated Style Steel Grating and IÂ 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):Â
  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.
No.
Item
Detailed Description
1
Bearing Bar
25x3, 25x4, 25x4.5, 25x5, 30x3, 30x4, 30x4.5, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10---100x10mm etc; IÂ bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etc
US standard: 1' 'Â x3/16' 'Â , 1Â 1/4' 'Â x3/16' 'Â , 1Â 1/2' 'Â x3/16' 'Â , 1' 'Â x1/4' 'Â , 1Â 1/4' 'Â x1/4' 'Â , 1Â 1/2' 'Â x1/4' 'Â , 1' 'Â x1/8' 'Â , 1Â 1/4' 'Â x1/8' 'Â , 1Â 1/2' 'Â x1/8' 'Â etc
2
Bearing Bar Pitch
12.5, 15, 20, 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
3
Twisted Cross Bar Pitch
38.1, 40 50, 60, 76, 80, 100, 101.6, 120mm, 2' ' & 4' ' etc                                                  Â
4
Steel  Grade
ASTM A36, A1011, A569, Q235, S235JR, S275JR, SS304, Mild steel &Â Low carbon steel, etc
5
Surface Treatment
Black, self colour, hot dip galvanized, painted, spray coating  Â
6
Grating Style
Plain / Smooth, Serrated /teeth, I bar, serrated I bar                                                        Â
7
Grating Standard
China: YB/T 4001.1-2007,   USA: ANSI/NAAMM(MBG531-88),
UK: BS4592-1987,   Australia: AS1657-1985, Japan: JIS                                              Â