GB Standard Q235/Q235A/Q235B Series Galvanized Steel Grating | Custom Size Welded Steel Grating Manufacturer Royal Steel Group
| Product Name | Steel Grating |
| Material | Carbon Structural Steel (Q235 / Q235A / Q235B) |
| Standard | GB Standard |
| Dimensions | Standard Width: 600–1500 mm |
| Standard Height/Thickness: 25–50 mm | |
| Grating Spacing: 30–100 mm | |
| Customization | Custom Size & Spacing Available |
| Tolerance | Length: ±2 mm |
| Width: ±2 mm | |
| Thickness: ±1 mm | |
| Quality Inspection | Chemical composition test (Spectrometer) |
| Mechanical property test (Tensile, Hardness) | |
| Flatness inspection | |
| Weld strength test | |
| Surface Treatment | Hot-dip galvanization (HDG) |
| Electro-galvanization | |
| Powder coating / Spray painting | |
| Plain black / Raw steel finish | |
| Applications | Industrial walkways & platforms |
| Steel stair treads | |
| Drainage grating covers | |
| Warehouse and 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 |
| Category | Key Parameters / Types | Common Specifications (mm) | Applications & Characteristics |
| Bearing Bar (Height × Thickness) | Standard Type | 25×3, 30×3, 32×5 | Industrial walkways, stair treads, maintenance platforms. |
| Heavy-Duty Type | 40×5, 50×5, 60×10 | Parking lots, cargo terminals, large-span industrial areas. | |
| Mesh Size (Pitch Bar × Cross Bar) | Series 1 (30mm pitch) | 30 × 50 / 100 | Most common; highest strength, complies with international industrial codes. |
| Series 2 (40mm pitch) | 40 × 50 / 100 | Economical; suitable for light-load walkways or fencing. | |
| Series 3 (60mm pitch) | 60 × 50 / 100 | Mining, large washing plants (prevents debris accumulation). | |
| Material Grade (Q235) | Q235A | No impact test required | Indoor use, general structural components; cost-effective. |
| Q235B | 20°C Impact Test | Standard choice; better weldability and toughness for major projects. | |
| Surface Treatment | Hot-Dip Galvanized (HDG) | Zinc coating ≥ 610g/m² | Superior corrosion resistance (20+ years); best for outdoor/marine environments. |
| Black / Painted | No zinc coating | Temporary projects, low budget, or dry indoor environments. | |
| Surface Profile | Plain / Serrated | Plain / Serrated (Anti-slip) | Serrated type provides excellent anti-slip properties in oily or icy conditions. |
| Category | Key Parameters | Description |
| 1. Dimensions | Span (L) × Width (W) | Critical: Always specify the direction of the bearing bars (Span). |
| 2. Structure | Bearing Bar Size | Height × Thickness (e.g., 32×5mm, 40×5mm). |
| Mesh Pitch | Center-to-center distance of Bearing Bars × Cross Bars. | |
| 3. Material | Steel Grade | Q235B (Standard), Q355B (High Strength), SS304/316. |
| Surface Finish | Hot-Dip Galvanized (HDG), Painted, or Mill Finish. | |
| 4. Configuration | Surface Profile | Plain (Smooth) or Serrated (Anti-slip). |
| Special Cuts | Circular cuts, notches, or cut-outs for pipe penetrations. | |
| 5. Edging | Banding & Safety | End-banding, Toe Boards (Kick plates), or Nosing for stairs. |
| 6. Accessories | Fixing Clips | Saddle clips, G-clips, or Grating fasteners. |
1. Walkways
Provides a safe and stable walking surface for personnel in industrial plants, factories, and warehouses.
The open-grid design ensures slip resistance while allowing dirt, liquids, and debris to pass through, keeping the surface clean and hazard-free.
2. Steel Staircases
Ideal for industrial and commercial stair treads where durability and anti-slip performance are essential.
Optional serrated or anti-slip inserts can be added for enhanced safety.
3. Work Platforms
Widely used in workshops and maintenance areas to support machinery, equipment, and personnel.
The open design allows for proper ventilation and easy cleaning of work surfaces.
4. Drainage Areas
The open-grid structure enables efficient passage of water, oils, and other fluids.
Commonly installed in outdoor areas, factory floors, and alongside drainage channels to ensure safe and effective fluid management.
From industrial platforms in the Middle East to infrastructure builds across the Americas, Royal Steel Group supplies high-quality steel grating solutions to customers around the world. With local support teams in the USA and Guatemala, we’re set up to handle even the most complex structural requirements. Our steel gratings are built for strong load-bearing performance and reliable anti-slip safety, backed by 8 strategically located warehouses to keep lead times short and supply chains smooth for large-scale energy and mining projects.
Packing
Standard Export Packing
Grating panels are bundled securely with steel straps and reinforced to avoid deformation or damage during transit.
Customized Labels & Project Identification
Each bundle can include labels indicating material grade, size specifications, and project codes for efficient handling at the job site.
Additional Protection Available
Wooden pallets, protective covers, and enhanced packaging can be provided for sensitive surface requirements or long-distance shipment.
Delivery
Lead Time
Typically 7–15 days after order confirmation, subject to order quantity and customization.
Flexible Shipping Options
Supports container loading, flatbed transportation, and local delivery arrangements.
Safe Handling & Transport
Packaging is designed for safe lifting, loading/unloading, and efficient installation upon arrival.
Stable cooperation with shipping companies such as MSK, MSC, COSCO efficiently logistics service chain, logistics service chain are we to your satisfaction.
We follow the standards of quality management system ISO9001 in all procedure, and have strict control from packaging material purchase to transport vehicle scheduling.
1. What are the main advantages?
It boasts high load-bearing capacity, excellent corrosion resistance, long service life, and a reasonable price, making it the best choice for industrial and heavy-duty applications.
2. Does it meet US or international standards?
Yes. It can be manufactured according to OSHA safety regulations, ANSI/NAAMM specifications, ASTM A36 (steel) standards, and ASTM A123 (galvanized) standards.
3. What are the standard applications?
Widely used in industrial platforms, walkways and trench covers, oil and gas plants, power plants, and shops.
4. Can sizes and specifications be customized?
Yes. We can customize load-bearing bar sizes, spacing, panel sizes, thicknesses, and serrated (anti-slip) surface options according to specific project requirements.
5. How long is the service life?
With proper galvanizing, the service life can exceed 20 years under normal outdoor conditions, but its service life is greatly affected by climate and exposure conditions.
Contact Details
Address
Kangsheng development industry zone,
Wuqing district, Tianjin city, China.
Phone
Hours
Monday-Sunday: 24-hour Service
