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Hot DIP Galvanized Steel Grating Stair Tread with Square Grid for Trench Drain and Good Drainage

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Hot DIP Galvanized Steel Grating Stair Tread with Square Grid for Trench Drain and Good Drainage

Steel grating also named bar grating.

The grating is with a square grid in the middle, composed by flat bearing bar and cross roun bar. mainly used as gutter cover, Steel structure platform walkway, steps of steel ladder, etc.

The steel grating is generally made of carbon steel, and the surface is hot-dip galvanized, which can prevent oxidation. It can also be made of stainless steel, aluminum steel.

According to the welding method, it can be divided into: machine forge welding type and handmade manual welding type.

According to surface of the loaded flat steel, it can be divided into: flat type, tooth type and "I" type.

According to its purpose, it can be divided into: trench cover, platform walkway, stair treads.

According to its mateiral, it can be divided into: midl steel, aluminum, stainless steel.


Main Features of Steel Tread

1) Grating can load withstand repeat load impacts and have outstanding durability;
2) Because of big opening area, gratings have good drainage function, and can be kept hygienic;
3) Easy to install and to clean;
4) Having corrosion resistance after galvanizing, so it is economical;
5) With a wide variety and types, can select according to different occasions.


Specification of steel grating
No.
Item
Description
1
bearing bar
20 x 5, 25 x 3, 30 x 3, 30 x 5, 32 x 3, 32 x 5, etc.
2
bearing bar pitch
15mm, 25mm, 30mm, 40mm, 50mm, or as customers' requirement
3
cross bar
5 x 5, 6 x 6 (twisted bar or round bar)
4
cross bar pitch
40mm, 50mm, 60mm, 100mm, or as customers' requirement
5
flat bar type
plain, serrated (tooth-like), I bar (I-section), serrated I-shape bar
6
surface treatment
untreated, hot dip galvanized,powder coated, and electro polished, etc.
7
steel grating standards
China: YB/T4001.1-2007; US: ANSI/NAAMM(MBG531-88); UK: BS4592-1987
8
steel product standard
China: GB700-88; US: ASTM(A36); UK: 43A
9
hot galvanized standard
China: GB/T13912; US: ASTM(A123); UK: BS729

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