Since the establishment of our company, Steel Bar Grating, Plain Bar Grating, Serrated Steel Grating are well received by users because we have rich experience in product production and grasp market opportunities. In order to meet the market development needs, our company continues to promote the realization of "technological innovation strategy". We take the synergistic and efficient organizational system and working mechanism as the guarantee to ensure the company's management interface is clear and the system operation risk is reduced. We hope that our products will bring you a pleasant experience and carry a feeling of beauty. We have established our own sales network in many countries around the world, and set up sales branches and service outlets in major cities across the country, which can provide timely and convenient services for our customers.
Steel stair treads are the primary load-bearing grating product for industrial and commercial applications, also known as welded bar grating stair treads. Due to its robustness, durability, and high load-carrying capacity, it can meet all load-bearing application requirements, making it the most popular bar grating in many architectural, commercial, and industrial applications.
* Materials: Mild steel, Stainless steel, Aluminum steel
* Surface Treatment: Galvanized , Painting
Types of Steel Stair Treads
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Welded fixing, banded ends without nosing. | Bolted fixing, holed end plates without nosing. |
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Welded fixing, banded ends with checker plate nosing. | Bolted fixing, holed end plates with nosing. |
Specifications of Steel Stair Treads
* Length
1) Common length: 700, 800, 900 mm.
2) Maximum length: 1200 mm, suitable for several people passing at the same time in double direction or it is used as the escape line for workers.
3) Minimum length:600 mm, suitable for single person passing.
* Bearing Bar Pitch: 20 mm, 30 mm or 40 mm.
* Cross Bar Pitch: 50 mm or 100 mm.
* Nosing Type: checker plate, strip plate and hole plate.
* Bearing Load: 1.5kN.
* Deflection: no larger than 1/500 of span.
* Deflection Testing Method:
1) Span no larger than 1200 mm: press 1.5 kN load at the 100 mm × 100 mm area.
2) Span larger than 1200 mm: press 1.5 kN at the symmetrical 600 mm position.
* End Plate Size and Hole Size of Bolted Fixing Grating: refer to table 10.
* Tolerance of Steel Stair Treads
1) Length tolerance: +0/-3mm.
2) Width tolerance: ± 3mm.
3) Vertical tolerance. Vertical tolerance angle is no larger than 25°.
Steel Grating Tolerance for Stair Treads
Connection of Stair Treads and Ladder Beam
* Bolt connection: it adopts thickening end plate for welding and pre-holed on the end plate and fixed by bolts and nuts. It is recycled for other applications or places.
* Welded connection: it is difficult to uninstall but more economical and firmer than bolted connection.
Technical Parameters
Flat Bar Welded Steel Stair Treads Specification | ||||
Item | Plate Width (mm) | Plate Thickness (mm) | Plate Pitch (mm) | Cross Bar Pitch (mm) |
SGDF-01 | 65 | 5 | 20/30/40 | 50/100 |
SGDF-02 | 60 | 5 | 20/30/40 | 50/100 |
SGDF-03 | 55 | 5 | 20/30/40 | 50/100 |
SGDF-04 | 50 | 5 | 20/30/40 | 50/100 |
SGDF-05 | 50 | 3 | 20/30/40 | 50/100 |
SGDF-06 | 45 | 5 | 20/30/40 | 50/100 |
SGDF-07 | 40 | 5 | 20/30/40 | 50/100 |
SGDF-08 | 40 | 3 | 20/30/40 | 50/100 |
SGDF-09 | 35 | 5 | 20/30/40 | 50/100 |
SGDF-10 | 35 | 3 | 20/30/40 | 50/100 |
SGDF-11 | 32 | 5 | 20/30/40 | 50/100 |
SGDF-12 | 32 | 3 | 20/30/40 | 50/100 |
SGDF-13 | 25 | 5 | 20/30/40 | 50/100 |
SGDF-14 | 25 | 3 | 20/30/40 | 50/100 |
SGDF-15 | 20 | 5 | 20/30/40 | 50/100 |
SGDF-16 | 20 | 3 | 20/30/40 | 50/100 |
Heavy Duty Press-Locked Steel Stair Treads Specification | |||||
Item | Plate Width (mm) | Plate Thickness (mm) | Plate Pitch (mm) | Cross Bar Size (mm) | Cross Bar Pitch (mm) |
SGDP-01 | 150 | 8 | 40 | 8 × 8 | 50/100 |
SGDP-02 | 130 | 8 | 40 | 8 × 8 | 50/100 |
SGDP-03 | 120 | 8 | 40 | 8 × 8 | 50/100 |
SGDP-04 | 100 | 8 | 40 | 8 × 8 | 50/100 |
SGDP-05 | 90 | 8 | 40 | 8 × 8 | 50/100 |
SGDP-06 | 80 | 8 | 40 | 8 × 8 | 50/100 |
SGDP-07 | 75 | 8 | 40 | 8 × 8 | 50/100 |
SGDP-08 | 75 | 6 | 30 | 8 × 8 | 50/100 |
SGDP-09 | 75 | 6 | 40 | 8 × 8 | 50/100 |
SGDP-10 | 70 | 6 | 30 | 8 × 8 | 50/100 |
SGDP-11 | 70 | 6 | 40 | 8 × 8 | 50/100 |
With strong technical strength, supply and marketing capabilities, our products are widely used in Steel Stair Treads. Our company is supported by excellent management, with rich practical experience in the industry for many years, has obtained a number of qualification certification. Our company has a good reputation and wide popularity in the industry.
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