Anping County Zhongqian Construction Material Technology Co.,Ltd.
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I-shape Steel Grating

  • US $35-150/Sheet

  • 100 Sheet/Sheets

  • 10000 Metric Ton/Metric Tons per Month

  • Tianjin

  • T/T, LC, D/A, D/P, O/A



I-Shape Steel Grating is used where high strength is required and light weight is critical with saving materials and more economical, perfect appearance.

I-Shape Steel Grating Features:
a)Type of bearing bar: 25x5x3,32x5x3,38x5x3,50x7x4,60x7x4,...75x7x4mm
b) Pitch of bearing bar: 12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3, 34.3, 35, 40, 41, 60 mm.
c) Pitch of cross bar: 38,50,76,100,101.6mm
d) Material: mild steel or stainless steel
e) Finish: hot dip galvanizing, painted, untreated, mill
f) Steel grating standards:
1) China: YB / T4001 - 1998
2) USA: ANSI / NAAMM (MBG531 - )
3) UK: BS4592 - 1987
4) Australia: AS1657 - 1985

Steel Grating Types

Steel Grating Types

I bar

Serrated I bar

round bar

flat bar





I-shape Steel Grating

Raw Materials 
Our raw materials are procured only from reputable sources that we regularly visit and audit. 
Our material suppliers are all ISO 9001 certified and we procure our raw materials to the following minimum standards and grades:
ASTM A1011M (American Standard) 
BS EN 10025 Grade S275 JR (British Standard and European Norm)

Manufacturing Standards 
We manufacture our gratings to many international standards of which the most common are:
ANSI/NAAMM MBG 531-00 (American National Standard)
BS 4592-1:2006 (British Standard)

Our welders are tested and approved to the following standards:
AWS D1.1:2010 (American Welding Standard) 
BS EN 287-1:2004 (British Standard and European Norm)

Hot Dip Galvanized 
Our products are hot dip galvanized (if required) to the following standards:
ASTM A123 (American Standard) 
BS EN ISO 1461:2009 (British Standard and European Norm)


Technological Process
(1) Material
(2) Pressure Welding
(3) Cutting
(4) Welding of Ends Bar
(5) Hot Dipped Galvani-zation
(6) Final Shipment



Keys for installing the Gratings

The cross bars should be on the top while installing the gratings. The gratings should be always firmly attached onto their supports with following methods:

1. Welding Fixed 
Suitable for those permanently installed gratings or those which are not to be removed frequently

Welding Fixed

2.Use of Clips and Screws 
Suitable for gratings that are to be removed frequently.and won't damage the Grating itself.

Use of Clips and Screws

3.Space for cutouts 
When the cut of a corner is necessary while meeting a round obstacle, the diameter of the corner should be at least 50mm wider than that of the round obstacle. All rectangular cutouts are made with a space no wider than that of the flat iron of the graings.

Space for cutouts