Welded Steel Grating is made by welding with flat steel and bars with certain distances. It goes through cutting, opening, edging and other processes. The products enjoy the feature of high strength, light structure, high bearing, convenience for loading and other features. The hot dipped zinc coating gives the product excellent anti-corrosion.
Surface process of welded steel gratings: there are three types:hot-dipped galvanized , electro-galvanized and spraying brushing and soaking.anti-acid and alkali corrosion capacity the range PH6 to PH12.5,a stable protective film will be formed on the zinc surface.it has good anti-corrosive property.surface treatment.
Tolerance welded 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.
Welded Steel Grating Specification:
- Material: Mid steel Q235(Low carbon steel), stainless 201,304,316
- Bearing bar size: 20*3mm; 25*3mm; 30*3mm; 30*5mm; 40*5mm;or as your requirement
- Bearing bar spacing: 30mm
- Cross bar spacing: 100mm
- Steel grating style: plain bar, serrated bar, I bar(plain), I bar(serrated)
- Methods of manufacturing: welding grating, swage locked grating, dovetail pressure locked grating
- Surface treatment: hot dipped galvanized; paint; untreat
1. Beautiful appearance and easy to install.
2. Good anti-slip performance and strong pressure resistance.
3. Good rust and corrosion resistance,durable.
Steel grating is suitable for alloys, building materials, power stations, boilers, shipbuilding, petrescence,
chemical and general industrial plants, municipal construction and other industries.
|Drainage steel grating cover Drainage ditch material
Steel,Low carbon steel,stainless steel&Q235,A36,SS304,SS316L,
||Black, hot dipped galvanized, paint
|Bearing bar width*thickness
|Bearing bar pitch
12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3, 34.3, 35, 40, 41, 60mm.
US standard: 1"x3/16", 1 1/4"x3/16", 1 1/2"x3/16", 1"x 1/4",
1 1/4"x 1/4", 1 1/2"x 1/4" etc.
|Bearing bar shape
Plain Style Steel Grating, Serrated Style Steel Grating and I
Bar Type Steel Grating.
|Drainage steel grating cover drainage ditch standard
China: YB/T 4001.1-2007, USA: ANSI/NAAMM(MBG531-88),
UK: BS4592-1987, Australia: AS1657-1985, Japan: JJS.
|Cross bar shape
|Cross bar pitch
||US: ASTM (A123), CN: GB/T13912, UK: BS729
||America45%,Europe26%,Middle east38%,Other place27%