In order to meet the strict requirements of our customers, we actively and continuously innovate our technology and ensure the leading quality of our Hot Dip Galvanized Steel Grating, Press Locked Stainless Steel Grating, Hot Dip Galvanised Steel Grating. We will vigorously promote the transformation and upgrading of the enterprise and the development of diversification. Under the guidance of scientific development concept, we firmly establish the development concept of innovation-driven and environmental protection priority. We increase our material resources and improve our profitability and service ability. We have introduced a large number of modern high-quality management personnel, and together we have built a scientific and complete modern management system.
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 |
The quality of product packaging is becoming more and more important, directly affecting Welded Bar Grating Stair Treads/Slip Resistant Stairtreads/Steel Grating Treads quality and sales and the honor and benefits of the manufacturing enterprise, and is increasingly valued by consumers and enterprises. It's our pursuit target to develop together with our clients. We are committed to leading market demand in achieving corporate development goals.
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