Ningbo Lihong Steel Grating Co., Ltd is a leading professional designer & manufacturer of high quality steel grating for global construction projects with a competitive price, located in Ningbo near to Shanghai of China. We have been approved by ISO9001-2000 Quality Management System in 2001.70% of products is regularly exported to the worldwide every year. There are many regular grating customers in USA (Houston, Ohio, Chortle, and LA), Middle East, AUS, Europe and Southeast so on. There are three production lines in our company, two lines are automatic Press welded systems, and another one is handwork line for some irregular steel gratings. Annual tons quantity: 20000-30000 tons.
This company is specialized in manufacture and exports all kinds of steel gratings with the best quality, competitive price and faster delivery time. Such as steel mill black and hot dip Galvanizing and stainless grating flooring walkway, platform and steel structures, stair tread, well cover, trench cover, compound gratings, storage shelves, ladder, fences and handrail so on for many construction projects, for example, oil project, seaport, power plant, water plant, defense project, chemical factory and so on.
We produce three kinds of steel gratings, they are Plain Style Steel Grating, Serrated Style Steel Grating and I Bar Type Steel Grating. They are widely used in steel structure platforms, stair treads, sidewalks, drainages and well covers etc. We can design and manufacture standard steel grating and in customized shapes per client's requirements.

1) Bearing Bar (Load Bar) Specifications (mm):
The specification of plain type and serrated type bearing bar is 20 x 3 to 100 x 10; The specification of I-section type is 25 x 5 x 3, 32 x 5 x 3, 38 x 5 x 3, 40 x 5 x 3, 50 x 5 x 3, 50 x 7 x 4, 55 x 7 x 4, 60 x 7 x 4, 65 x 7 x 4, 70 x 7 x 4, 75 x 7 x 4, etc.

2) Bearing Bar Pitch (center to center):
12.5, 15, 25, 30, 30.16, 32.5, 34, 40, 41.25, 45, 50, 60, 60.32, 80, 100 mm etc, also be according to client's requirement and 30, 40, 60mm are recommended, America standard is available <1'' x 3/16'', 1 1/4'' x 3/16'', 1-1/2'' x 3/16'', 1'' x 1/4'', 1-1/4'' x 1/4'', 1 1/2'' x 1/4''(19-w-4) and so on. >

3) Material:
Mild Steel (Low Carbon Steel ASTM A36 or Q235) or Stainless Steel

4) Surface Treatment:
Untreated, Painting or Hot dip Galvanizing

5) Steel grating standards:
A) China: YB/T4001-1998
B) USA: ANSI/NAAMM (MBG531-88)
C) UK: BS4592-1987
D) Australia: AS1657-1985
E) Japan: JJS.

Stair tread, steel stair tread, step ladder