Hot dip galvanized steel grating features
(1)Attractive appearance:beautiful outline,silver colour.
(2)Optimum water draining: Seepage area reaches 89.3%,which is more larger than cast iron.
(3)Hot-dip galvanizing:Hot dipped galvanized surface treatment is professional and can prevent rust effectively.
(4)Design of preventing stealing:The cover is connected with the frame by gemel,which ensures protection, safety, and convenient opening.
(5)Saving investment:With large span,the cost is lower than that of cast iron when under heavy load.And the replacement expenses in case of theft and crushing will be saved.
(6)High strength:With strength:With strength and toughness far higher than those of cast iron,it can be used in the environment with large span and heavy load,such as the wharf and the airport.
(7)Many specifications available: The requirement of different environments,loads,spans,sizes and shapes can be satisfied.
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Specification
Matrial | Low carbonsteel / Stainless steel |
Grade | CN: Q235, Q345 ; UK: 43A |
Bearing bar size | 20X5, 25X3, 25X4, 25X5, 30X3, 30X4, 30X5, 32X3, 32X5, 40X5, 50X4... 75X8, 100X8mm, etc |
Bearing bar pitch | 20,25,30,32.5,34.3,40,50,60,62,65mm |
Bearing bar type | plain, Serrated (tooth-like), I bar (I section), Serrated-I |
Cross bar size | 5X5, 6X6, 8X8mm (twisted bar)/5, 6, 8mm ( round bar) |
Cross bar pitch | 40, 50, 60, 65, 76, 100, 101.6, 120, 130mm, etc. |
panel size: | 1000x1000mm, 1000x2000mm, 1000x3000mm, 1000x6000mm |
Surface treatment | Untreated, hot DIP galvanized, cold DIP galvanized, painted, powder coated, pickling, electrolytic polishing, or as customers’ requirement. |
Most Popolar
NO. | Bearing size(mm) | Cross bar pitch(mm) | Weight(kg/square meter) |
G253/30/50 |
25x3 | 50 | 25.7 |
G253/30/100 | 100 | 22.8 | |
G255/30/50 |
25x5 | 50 | 39 |
G255/30/100 | 100 | 36.2 | |
G323/30/50 |
32x3 | 50 | 31.3 |
G323/30/100 | 100 | 28.4 | |
G325/30/50 |
32x5 | 50 | 48.4 |
G325/30/100 | 100 | 45.5 |
Surface treatment: untreated(black), hot-dipped galvanized ,powder coated, electroplate,
painting or as per customers’ requirement.
Specification of galvanized steel grating:
Common specification of Steel grating | |
Material Standard | ASTM A36, A1011, A569, Q235, S275JR,Stainless steel 304, Mild steel & Low carbon steel, etc |
Bearing Bar (width*thickness) | 25x3, 25x4, 25x4.5, 25x5, 30x3, 30x4, 30x4.5, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10…..100 x10mm etc; I bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etc US standard: 1''x3/16'', 1 1/4''x3/16'', 1 1/2''x3/16'', 1''x1/4'',1 1/4''x1/4'', 1 1/2''x1/4'', 1''x1/8'', 1 1/4''x1/8'', 1 1/2''x1/8'' etc |
Bearing Bar Pitch | 12.5, 15, 20, 23.85, 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. |
Twisted Cross Bar Pitch | 38.1, 50, 60, 76, 80, 100, 101.6, 120mm, 2'' & 4'' etc |
Surface treatment | untreated(black), hot-dipped galvanized ,powder coated, electroplate, painting or as per customers’ requirement. |
Grating Style | Plain / Smooth, Serrated /teeth, I bar, serrated I bar |
Specifications of steel grating
1>Material :Mild steel & Low carbon steel, etc.
2>Surface treatment: hot-dipped galvanized, electric galvanized.
1>Bearing bar shapes: plain or serrated or I bar type.
2>Bearing Bar Pitch (center to center): 30, 40, 60mm are recommended,but we can also do it under customer's request.
3>Bearing Bar (Load Bar) Specifications (mm):The specification(thickness of bearing bar)of plain type and serrated type is 20 x 3 to 100 x 10;
4>Cross bar pitch(mm) :38, 40, 50, 60, 76, 80, 100, 110, 120 etc.
Standards of serrated galvanized steel grating.
Steel grating standard | Steel standard | Galvanizing standard | |
China standard | YB/T 4001.1-2007 | GB700-88 | GB/T13912-2002 |
USA standard | ANSI/NAAMM(MBG531) | ASTM(A36) | ASTM(A123) |
U.K. standard | BS4592 | BS4360(43A) | BS729 |
Australia standard | AS1657 | AS3679 | AS1650 |
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Tolerance of hot dip galvanized steel grating
The allowed deviation of length is +0/-5mm, while the allowed deviation of width is +/-5 mm.
The non-perpendicularity of bearing bar is allowed no more than 10% of width of bearing bar.
Cross bar surface should not surpass bearing bar surface 1mm, beginning & end of cross bar should not surpass the end surfaces of two sides of grating 2mm.
Packaging and shipping of steel grating
Steel grating ready to delivery. Stock place of our factory.
Inspection process of the steel grating.
To make sure the goods is seriously as customer's request, we have professional inspector who check the steel grating quality in each step from material collecting to goods loading.