Hot DIP Galvanized Steel Stair Treads with Bearing Bar Specifications and BS4592-1987 Standard

Step plate The tread plate, also known as the stair tread plate, steel ladder plate or steel ladder, is a type of staircase with grating plates used on the platform. According to the installation method, there are generally two major types: welded fixation and bolted fixation. The type that is directly welded to the keel does not require the addition of side plates for the tread plate, which is relatively economical and durable but not easy to disassemble. The bolt-fixed tread plate requires thickened side plates on both sides, with holes drilled in the side plates, and is directly fixed by bolts during installation.

1) Bearing Bar (Load Bar) Specifications (mm):
The specification of plain type and serrated type bearing bar is 25 x 3 to 100 x 8; 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, 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) 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

GNEE STEEL ,Has dedicated in producing and exporting all types of steel gratings for more than 19 years,A Professional Steel Grating & Safety Grating Manufacturer for Projects Engineering.

Factory

Advanced Equipment

We have more than 30 production lines of welded steel gratings and press lock gratings. Advanced equipment, skilled workers contribute to low production loss, high production efficiency and low products costs.

Supervise Strict Testing

All steel gratings are supervised by strict QUALITY CONTROL System both in International standard and enterprise test flow. All products our customers received are qualified and best in performance and package.

Steel Gratings Types We Supply

GNEE Steel Grating Application

Steel grating are designed and manufactured for various industrial and civil constructions in city road, gardens, yard, airport, railway and industrial engineering.

• Hot dip galvanized steel grating is the best choice for steel platforms in airports. Grating with 30 × 3 mm thick load bearing bars with a pitch of 30 mm and traverse bars at 50 mm or 100 mm is the suitable one.
• Steel grating, with robust design and spanning abilities, is very strong and safe for the support of floors and elevated walkway. It can be used for ceiling, interior decoration, platform aisle, ventilation windows, (Wells), advertising plaque and other construction.
• Widely used in the petrochemical industry, power plants, waterworks, sewage treatment plants, municipal works, sanitation projects in areas such as platforms, corridors, bridge, ditch cover, covers, ladders, fences, rails, and so on.