Click the button on the right to view all specifications or custom specifications for steel staircases.
Modern Steel Staircase Design Customized Metal Stair Fabrication for Buildings
Product Detail
| Parameter | Technical Options & Standards |
| Material Grades |
Carbon Steel: Q235B, Q355B, Q420B International Equivalents: ASTM A36, ASTM A572 Gr.50, EN10025 S235JR/S355JR |
| Applicable Standards | OSHA 1910.25, IBC (International Building Code), AS 1657, BS EN ISO 14122 |
| Stringer Types | C-Channel Stringers, Welded H-Beam Stringers, Custom Box Sections |
| Stair Treads Options | Diamond Checkered Plate, Serrated/Smooth Bar Grating, Perforated Anti-Slip Treads |
| Surface Treatments | Hot-Dip Galvanized (Zinc coating $\ge$ 85 $\mu$m), Zinc-Rich Epoxy Primer + Polyurethane Topcoat, Powder Coating |
| Handrail & Balustrade | Combined industrial pipe handrails, safety cages, or customized architectural railings |
General Steel Staircase Dimension Table
Staircase dimensions and slopes vary significantly depending on whether the application is industrial (maintenance) or commercial/public (occupant egress):
| Staircase Type | Common Slope Angle | Riser Height (Rise) | Tread Depth (Run/Going) | Clear Width |
|---|---|---|---|---|
| Industrial / Maintenance | 35° - 45° | 180mm - 210mm
(approx. 7" - 8.25")
|
220mm - 260mm
(approx. 8.5" - 10")
|
700mm - 900mm
(approx. 28" - 36")
|
| Commercial / Public Egress | 24° - 30° | 150mm - 170mm
(max 7" per IBC)
|
280mm - 300mm
(min 11" per IBC)
|
≥ 1100mm
(min 44" per IBC)
|
| Fixed Industrial Steep Stairs | 45° - 75° | 200mm - 250mm | 150mm - 200mm | 600mm - 700mm |
Download the full size chart
Standard Steel Stair Tread Specifications
In industrial platforms and commercial fire escapes, Steel Grating Treads or Checker Plate Treads are the industry standards. Below are the most widely specified standard sizes for steel grating stair treads:
| Tread Length (L)(Stair Width) | Tread Width (W)(Tread Depth) | End Plate Bolt Hole Centers (C) | Recommended Bearing Bar Sizes(Load Capacity) |
| 600 mm (24") | 250, 275, 300 mm | 100 / 150 mm | 25 × 3 mm or 25 × 5 mm |
| 700 mm (28") | 250, 275, 300 mm | 100 / 150 mm | 25 × 3 mm or 32 × 3 mm |
| 800 mm (32") | 250, 275, 300 mm | 100 / 150 mm | 32 × 3 mm or 32 × 5 mm |
| 900 mm (36") | 275, 300 mm | 150 mm | 32 × 5 mm or 40 × 5 mm |
| 1000 mm (40") | 275, 300 mm | 150 mm | 40 × 5 mm or 45 × 5 mm |
Structural Components & Safety Clearance Requirements
When detailing fabrication drawings or cross-checking site layouts, ensure compliance with these crucial structural parameters:
Stair Stringer Selection:
1.Light-duty / Short spans: Typically utilizes Channel Sections ([10# to [14# or C4 to C6).
2.Heavy-duty / Long spans: Prefers Channel Sections ([16# to [22# or C8 to C10), Rectangular Hollow Sections (RHS), or Wide Flange/H-Beams.
Landing Width:
The clear width of any stair landing or intermediate platform must not be less than the clear width of the stair flights it serves (typically minimum 850mm for industrial and 1100mm for commercial).
Handrails & Guardrails Height:
1.Standard Handrails: Must be between 900mm and 1015mm (34" to 40") measured vertically from the tread leading edge.
2.Platform Guardrails: Must be at least 1050mm to 1100mm (42") above the floor/platform level for high-altitude or exterior edge protection.
3.Post Spacing: Maintain a spacing of 1000mm to 1200mm between vertical stanchions.
Headroom Clearance:
The vertical clearance from the leading edge of the tread to any overhead obstruction must be at least 2000mm (6'-8"), though 2200mm is preferred to optimize ergonomics and safety.
If your project requires compliance with specific regional codes (such as OSHA 1910.25 for US industrial, IBC for US commercial, or BS EN ISO 14122 for European machinery access), let me know so I can tailor the exact parameter tolerances or load calculations for your steel specifications.
Comprehensive Manufacturing & Quality Control
Our systematic production workflow ensures that what is on the blueprint is exactly what arrives at your job site.
1.Tekla 3D Detailing:
Phase 1.Our design team translates your architectural drawings into precise 3D Tekla structural models, eliminating dimension conflicts before fabrication begins.
2.CNC Precision Fabrication:
Phase 2.Heavy-duty steel plates and sections are processed using CNC laser and plasma cutters, maintaining a strict tolerance within $\pm$1mm.
3.AWS Certified Welding:
Phase 3.All structural joints are welded by AWS (American Welding Society) or EN certified welders. Non-Destructive Testing (NDT/UT) is applied to critical load-bearing joints.
4.100% Trial Pre-Assembly:
Phase 4.We fully erect the steel staircase in our workshop to test bolt-hole alignment, riser uniformity, and structural stability before coating.
Steel Stair Customization Process
1.Submit your design drawings or project requirements.
2.24 hours professional design and quotation by our engineer.
3.The product specification and production matters shall be confirmed.
4.Begin to produce and have quality control strictly.
5.To your project site, we dispatch swift shipment!
Key Features & Advantages
Engineering Compliance: Fully compliant with OSHA & IBC regulations for riser height, tread depth, and handrail structural integrity.
Maximum Corrosion Protection: Heavy-duty hot-dip galvanization (zinc coating greater than 85 μm) ensures a service life of over 30 years in harsh coastal, chemical, or offshore oil & gas environments.
Modular "Plug & Play" Design: Pre-fabricated and pre-assembled in our factory before shipping. All components are bolt-connected, requiring zero on-site welding, which drastically cuts your installation time and labor costs.
High Load Capacity: Engineered to support heavy pedestrian traffic and heavy equipment loads, with structural calculations verified by our in-house engineering team.
Application
Home Steel Stair : Made for home and villa use, suitable for modern Home Steel Stair apartments. Emphasizes space-efficient layouts, architectural co-ordination and decorative value without compromising structural security.
Business Steel Stair: For shopping malls, office buildings,public buildings. Designed for visibility, traffic and code, they are as durable as functional.
Heavy Duty Steel Stair: Constructed for the industry: warehouse, factory. High strength, good corrosion resistance and service life in harsh working condition.
Why Global Buyers Choose Royal Steel Group
100% Code Compliant: Engineered precisely to meet OSHA, IBC, AS 1657, and EN ISO 14122 structural and safety standards.
Zero On-Site Welding: Our advanced "Plug & Play" modular design utilizing precision pre-punched bolt holes reduces your on-site installation time and labor costs by up to 40%.
Ultimate Corrosion Resistance: Available with premium Hot-Dip Galvanizing (exceeding ASTM A123/EN ISO 1461 standards) for a maintenance-free service life of 30+ years in marine or chemical environments.
3D Tekla Modeling Verification: Every staircase undergoes comprehensive 3D structural modeling and a 100% factory pre-assembly check before shipping to guarantee a perfect fit at your job site.
Packaging & Shipping
We protect your investment against the harsh realities of international transit.
Heavy-Duty Steel Cradles: Large components (stringers, platform frames) are strapped to custom-welded steel pallets for rapid, safe forklift handling.
Surface Protection: Multi-layer bubble wrap, edge guards, and heavy-duty PE stretch film prevent scratches to the galvanized or painted finishes.
3D Container Optimization: We utilize advanced container loading software to optimize space in 40ft HQ or Open Top containers, saving you up to 15% in ocean freight costs.
Site-Ready Tagging: Every individual tread, beam, and handrail is tagged with a weather-resistant barcode matching the 3D installation drawings for effortless on-site sorting.
ABOUT US
Royal Steel Group is a modern enterprise integrating steel structure research and development, design, manufacturing, and installation. We provide end-to-end solutions for industrial plants, logistics warehouses, commercial buildings, and public infrastructure, from conceptual design and precision manufacturing to on-site installation and after-sales support. Adhering to the philosophy of "Quality First, Customer Satisfaction," we deliver safe, reliable, and efficient projects with advanced equipment, experienced engineers, and a rigorous quality control system. Our professionalism and consistently high quality have earned the trust and recognition of customers throughout China.
FAQ
Q1: Can you provide customized steel staircase designs?
A: Yes. We design and manufacture steel staircases according to your drawings, dimensions, load requirements, and project specifications.
Q2: What types of steel staircases do you offer?
A: We offer straight stairs, spiral stairs, platform stairs, emergency escape stairs, industrial access stairs, and custom structural steel stair systems.
Q3: What materials and finishes are available?
A: Our staircases are manufactured from carbon steel or structural steel and are available with hot-dip galvanizing, powder coating, or painted finishes for enhanced corrosion resistance.
Q4: Which industries use your steel staircase solutions?
A: Our steel staircases are widely used in factories, warehouses, commercial buildings, power plants, steel structures, bridges, and other industrial facilities.
Q5: Do you provide fabrication and worldwide shipping?
A: Yes. We provide complete fabrication, quality inspection, secure packaging, and global shipping services to ensure safe and timely delivery.
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