Galvanized grating, also called galvanized steel grating or galvanized steel bar grating, refers to steel bar grating made of mild carbon steel through hot dipped galvanized surface treatment.
Mild carbon steel provides an economical, high strength for use in most industrial and commercial applications. And hot dipped galvanized surface treatment supplies excellent corrosion resistance performance for durability.
1. Description
(1) Structure: Welding with flat steel and cross/round bars with certain distances.
(2) Features: High strength, light structure, high bearing.
(3) Surface: The hot dipped zinc coating gives the product excellent anti-corrosion
Steel Grating Specification
Load Bearing Flat Bar size | Thickness≥3mm, depth ≥19mm |
19X3,19X5,20X3, 20X5, 25X3, 25X4, 25X4.5, 25X4.7, 25X5…..40X6, 40X8, 40X10,….90X6…. | |
Pitch of Load bearding flat bars(mm) | 12.5,15, 20, 30, 30.6, 32.5, 34, 34.8, 35.3, 40, 60, 80... |
Pitch of cross bars(mm) | 38.1, 50, 50.8, 70, 75, 80, 99,100, 101.6, 102... |
Steel Grating Standard
Country | Steel grating standard | Steel material standard | Hot galvanizing standard |
China | YB/T4001-1998 | GB 700-88 | GB/T13912-2002 |
USA | ANSI/NAAMM(MBG531-88) | ASTM (A36) | ASTM(A123) |
England | BS4592-1987 | BS4360 ( 43A) | BS729 |
Australia | AS1657-1992 | AS3679 | AS1650 |
Steel Grating More detailed information
No. | Item | Description |
1 | Bearing Bar | 25x3, 25x4, 25x4.5, 25x5, 30x3, 30x4, 30x4.5, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10---100x10mm 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 | ||
2 | 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. | ||
3 | Twisted Cross Bar Pitch | 38.1, 50, 60, 76, 80, 100, 101.6, 120mm, 2'' & 4'' etc |
4 | Material Grade | ASTM A36, A1011, A569, Q235, S275JR, SS304, SS400, |
Mild steel & Low carbon steel, etc | ||
5 | Surface Treatment | Black, self colour, hot dip galvanized, painted, spray coating |
6 | Grating Style | Plain / Smooth, Serrated /teeth, I bar, serrated I bar |
Steel Grating Type
1.Plain type:
One of the most wiely used gratings, available for flooring, sidewalk, dranage pit cover, stair tread, etc
2.Serrated type:
Better Non-skid property & safety compared with plain grating
3.I-shape type
Lighter, more economical and practical comparing with plain grating