Steel Grating Drainage Pit Cover

    Won's Brand Steel Bar Gratings are classified into two styles,namely plain style and serrated style as per the upper sdges

of bearing bars.More than 200 varieties are available based on specifications and spacing of bearing bars,and that os cross rods,Different protective ttreatment can be made on the surface as environment varies.

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),(19-w-2) and so on.>

3) Cross Bar Pitch (center to center):

38, 50, 76, 100, 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/T4001.1-2007

B) USA: ANSI/NAAMM (MBG531-93)

C) UK: BS4592-1:1995

D) Australia: AS1657-1985

Type
 
Welded steel grating, pressure-locked, socket-welding 
 

Steel flat size
 
20×3,25×3,25×5,30×3,30×4,30×5,32×3,32×5……45×5mm
 

Beraing bar pitch
 
12.5,15,20,25,30,35,40,50mm
 

Cross bar pitch
 
38,50,80,100mm