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High quality press welded black steel grating with CE approve

Min. Order
10 Pieces
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Company Information

Ningbo Jiulong Machinery Manufacturing Co., Ltd.

CN Manufacturer, Trading Company
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16 Years Paid Supplier Supplier
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Quick Details

Place of Origin: Zhejiang China
Brand Name: LongTa
Model Number: Plain bar grating, Serrated bar grating, I-shape bar grating
Material: ASTM A36, A1011, A569, Q235
Grating Standard: YANSI/NAAMM(MBG531-88),B/T 4001.1-2007,BS4592-1987,AS1657-1985
Hot Dip Galvanized standard: ASTM A123, AS1650, GB/t13912-2002
Certification: ISO 9000/9001/9004/19011: 2000
Grating Specification: 19-w-4, 15-w-2, 30/100, 40/50, 60/100 and all
Application: Industrial platform, flooring and walkway traffic, steel structure
Surface Treatment: Galvanized, painting, self-colour or untreated
Grating Steel Material: Low carbon steel, mild steel, stainless steel
Type: Plain bar grating, Serrated bar grating, I-shape grating
Market: America, Europe, Australia, Mid-east, Africa, Asia
Selling Units: Single item
Single package size: 20X20X10 cm
Single gross weight: 20 KG
Package Type: Packed in seaworthy,commonly bundled by bearing bar.
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Ningbo Jiulong Machinery Manufaturing Co.Ltd(NJMM) is a leading manufacturer specialized in steel grating for nearly 20 year.
Its production scale, product type, and export volume are all at the top class in China.
With 7 auto-press welding lines, our daily output has been reached 150tons. And our steel grating has been sold to over 50 countries all around the world.
Product Description


Steel graing is a kind of open steel member wth its bearing bar & cross bar jonting at intersections either by welding or by locking.


steel grating1.jpg 

Standard descriptions:

1Bearing bar25x3,25x4,30x3,30x4,30x5,32x5,40x5,50x5,.....75x10mm
2Bear bar pitch12.5, 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.
3Cross bar pitch38,50,76,100,101.6mm
5Surface treatmentBlack, hot dipped galvanising, paint
6StandardChina: YB/T 4001.1-2007
UK: BS4592-1987
Australia: AS1657-1985


Type of steel grating:


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



Company Information

With 20 years experience, and 7 auto-press welding lines, we are now the largest steel grating manufacturer in China, and daily output over than 150 tons.




We have passed ISO 9001:2000




 With 7auto-press welding lines, and our daily output can reach 150 tons





Fabricating. with 300 rich experienced employee, NJMM is the leading company of the steel grating on the market.




Our galvanization and its standard




We have a very complete internal quality control system 





Packaging & Shipping
 Finished grating is usually packed with steel belt, & wood is used for matting, for loading convenience. For standard grating panels, we usually use flat bar for packing.
And Now,  our steel grating has been sold  to over than 50 countries.

1, What standard can NJMM grating meet?

NJMM can fabricate steel grating accoding to the standards in different counties, such as China: YB/T4001.1-2007, USA: ANSI/NAAMM(MBG531), UK: BS4592 and so on.


2, What specification of the steel grating can NJMM fabricate ?

NJMM can fabricate any specification of steel grating available, both in inch description and metric description.


3,What are the most commonly stocked panel size?

The most common standard panel sizes are 3'x24,' 3'x20', 1000x6000mm,1000x5800mm etc.


4, what are the most commonly stocked bar sizes(height and thickness)?

The most common bars are 1"x1/8", 1"x3/16'', 25x3, 30x3, 32x3, 25x5, 32x5, 35x5, 38x5 etc.


5,Is a deflection chart or load table available for bar grating?

You can learn it at our catalog.


6, Whatis the difference between serrated and non-serrated bar grating?

Serration is done for slip resistance. It is grating which has the top surfaces of the bearing bars notched.


7, What finishes are offered on bar grating?

Bar grating comes in untreated, painted, hot dip galvanized.


Does NJMM do OEM?



Our Services


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