GB Q235 Q355 Heavy Duty Steel Grating | Custom Press Locked High Load-Bearing Capacity Steel Grating
| Core Parameter Table of Steel Grating Products | |||
| Parameter Category | Detailed Parameter | Parameter Category | Detailed Parameter |
| Product Name | Steel Grating Plate | Material Standard | GB Q235 Q355 |
| Specification & Dimension | Standard Width: 600–1500mm | Dimensional Tolerance | Length: ±2mm |
| Standard Height/Thickness: 25–50mm | Width: ±2mm | ||
| Grating Spacing: 30–100mm (Customizable) | Thickness: ±1mm | ||
| Quality Inspection | Chemical Composition Spectral Analysis | Surface Treatment | Hot-Dip Galvanization (HDG) |
| Mechanical Property Test (Tensile, Hardness) | Electro-Galvanization | ||
| Flatness Inspection | Powder Coating / Spray Painting | ||
| Welding Strength Test | Black Skin / Raw Steel Finish | ||
| Application Scenarios | Industrial Walkways & Platforms | ||
| Steel Stair Treads | |||
| Drainage Grating Covers | |||
| Warehouse & Factory Access Platforms | |||
| Ship Decks & Outdoor Facilities | |||
| Grating Type | Bearing Bar Pitch / Spacing | Bar Width | Bar Thickness | Cross Bar Pitch | Mesh / Opening Size | Load Capacity |
| Light Duty | 19 mm – 25 mm (3/4"–1") | 19 mm | 3–6 mm | 38–100 mm | 30 × 30 mm | Up to 250 kg/m² |
| Medium Duty | 25 mm – 38 mm (1"–1 1/2") | 19 mm | 3–6 mm | 38–100 mm | 40 × 40 mm | Up to 500 kg/m² |
| Heavy Duty | 38 mm – 50 mm (1 1/2"–2") | 19 mm | 3–6 mm | 38–100 mm | 60 × 60 mm | Up to 1000 kg/m² |
| Extra Heavy Duty | 50 mm – 76 mm (2"–3") | 19 mm | 3–6 mm | 38–100 mm | 76 × 76 mm | >1000 kg/m² |
| Model | Load-bearing Flat Steel Specifications (mm) | Flat Steel Spacing (mm) | Crossbar Spacing (mm) | Applicable Scenarios |
| G253/30/100 | 25×3 | 30 | 100 | Light-duty platforms, steps |
| G303/30/100 | 30×3 | 30 | 100 | General industrial platforms |
| G305/30/100 | 30×5 | 30 | 100 | Medium-load platforms |
| G323/30/100 | 32×3 | 30 | 100 | General industrial platforms |
| G325/30/100 | 32×5 | 30 | 100 | Heavy-duty platforms, workshops |
| G403/30/100 | 40×3 | 30 | 100 | Heavy equipment supports |
| G404/30/100 | 40×4 | 30 | 100 | Heavy equipment supports |
| G405/30/100 | 40×5 | 30 | 100 | Heavy-duty industrial platforms |
| G503/30/100 | 50×3 | 30 | 100 | Extra-heavy-duty platforms |
| G504/30/100 | 50×4 | 30 | 100 | Extra-heavy-duty platforms |
| G505/30/100 | 50×5 | 30 | 100 | Industrial plant operating platforms |
| G254/30/100 | 25×4 | 30 | 100 | Light-duty heavy-duty platforms |
| G255/30/100 | 25×5 | 30 | 100 | Light-duty heavy-duty platforms |
| G304/30/100 | 30×4 | 30 | 100 | Medium-heavy-duty platforms |
1. Irregular Shape Machining and CNC Pre-cutting: Based on your CAD drawings, we offer precise factory pre-cutting services, saving on-site time.
Irregular and Circular Cutouts: Custom-made openings to easily avoid vertical pipes, columns, and machinery.
Kickboards/Baseboards: Factory-welded edge plates ($100/5mm), compliant with international safety standards (OSHA and AS1657).
Corner Grooving: Precisely finished to fit stair landings and surrounding areas.
2. Load-Bearing and Surface Optimization:
Compression-Interlocking Grating: Hydraulically interlocked for high architectural symmetry (suitable for exterior walls, ceilings, and walkways).
Heavy-Duty Welded Grating: Custom-made load-bearing bars up to 100×10mm, suitable for heavy forklift, truck, or airport runway loads.
Anti-Slip Profiles: Smooth profiles for standard floors, serrated profiles for high-risk, oily/contaminated offshore oil and gas platforms.
3. Coating and Materials:
Hot-dip galvanizing (HDG): Zinc coating thickness from 60 g/m² to over 610 g/m² (thickness greater than 85 microns), conforming to ASTM A123 / EN ISO 1461 standards. Guaranteed rust-free for over 20 years in tropical/marine environments.
Alternative materials: Stainless steel (304/316) can be used in food processing plants; asphalt coating can be used for mine drainage.
1. Industrial Walkways
Galvanized Steel Grating provides a robust and stable walking surface for personnel in factories, workshops, warehouses, and industrial facilities. Its open mesh structure offers excellent slip resistance while allowing dust, water, and debris to pass through, helping to maintain a safer and cleaner working environment.
2. Steel Stair Treads
Steel grating is widely used in industrial staircases, platforms, and walkway systems requiring high strength and slip resistance. Serrated steel grating or custom slip-resistant designs are available to improve safety under harsh working conditions.
3. Maintenance and Work Platforms
Hot Dip Galvanized Grating is typically installed on production lines, equipment platforms, and maintenance areas to support workers, machinery, and industrial operations. Its open design improves ventilation, reduces surface buildup, and facilitates inspection and cleaning.
4. Drainage and Outdoor Applications
With its open structure and excellent load-bearing capacity, steel grating is ideal for drainage covers, trench covers, factory floors, and outdoor facilities. It effectively promotes the flow of water, oil, and other liquids while providing a durable and safe surface.
5. Industrial and Infrastructure Projects
Mild Steel Gratings are widely used in power plants, petrochemical facilities, mining projects, bridges, and infrastructure systems due to their corrosion resistance, long service life, and reliable performance.
High Strength and Durability
Constructed with structural steel, it boasts superior load-bearing capacity and an exceptionally long service life, suitable for industrial applications.
Customizable Solutions
A variety of sizes, grid designs, bar spacing, and surface finishes are available to meet project requirements.
Corrosion and Weather Resistance
Optional surface finishes include hot-dip galvanizing, powder coating, and painting, suitable for indoor, outdoor, and marine environments.
Safe and Practical Design
The open grid structure provides anti-slip, drainage, and ventilation features, creating a safer workplace.
Quality Control and Fast Delivery
Manufactured to strict quality standards, with flexible production and delivery options. Standard lead time: 7-15 days.
Packing
Standard Export Package
Steel straps tightly fasten all grating sheets with extra reinforcement to prevent bending and scratches in transit.
Custom Tags & Project Marking
We attach custom tags on every bundle, clearly marked with material grade, dimension data and project serial numbers, making on-site sorting much easier.
Extra Protective Solutions
Wood pallets, shielding films and upgraded packing packages are available for goods with special surface finish demands or long overseas transport.
Delivery
Production Lead Time
Our general turnaround takes 7–15 days once the order is confirmed; exact time depends on order volume and custom processing demands.
Multiple Shipping Choices
We offer container stuffing, flat truck transport and regional door-to-door delivery services to match your logistics plan.
Stable Transport & Easy Unloading
All packing designs take lifting, loading and unloading into consideration, so products can be quickly put into use after arrival.
1. What is GB Q235/Q355 heavy-duty steel grating?
GB Q235/Q355 heavy-duty steel grating is a high-strength steel grating product manufactured according to Chinese GB standards. It is specifically designed for heavy-duty applications requiring excellent strength, durability, and safety performance.
2. What are the differences between Q235 and Q355 steel grating?
Q235 has good weldability and overall structural performance, while Q355 has higher yield strength and better load-bearing capacity, making it more suitable for heavy industrial applications.
3. What are the main applications of heavy-duty steel grating?
It is widely used in industrial platforms, factory walkways, steel stair treads, drainage covers, mining facilities, power plants, petrochemical projects, and infrastructure construction.
4. Can steel grating be customized?
Yes. We can customize the load-bearing bar size, crossbar spacing, panel size, surface treatment, and load-bearing capacity according to project requirements.
5. What surface treatment processes are available?
Common surface treatment processes include hot-dip galvanizing, painting, and powder coating to improve corrosion resistance and service life.
6. Is GB Q235/Q355 steel grating suitable for outdoor environments?
Yes. Galvanized Q235/Q355 steel grating has excellent weather resistance and corrosion resistance, making it suitable for outdoor, coastal, and industrial environments.
7. What packaging methods are used for export shipping?
Steel grating panels are bundled with steel straps and protected with waterproof packaging film, and labeled with product specifications. Customized packaging is available upon request.
8. What is the delivery time?
Standard delivery time is typically 7-15 days after order confirmation, depending on quantity, specifications, and customization requirements.
9. Do you provide quality certificates?
Yes. We can provide Material Inspection Certificates (MTC), inspection reports, packing lists, certificates of origin, and other export documents required by customers.
10. Why choose Royal Steel Group's steel grating?
Royal Steel Group offers reliable steel gratings that meet GB Q235/Q355 standards, with strict quality control, customized solutions, highly competitive prices, and professional global export services.
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