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| Material Options | Mild Steel (Carbon Steel) |
|---|---|
| Bearing Bar Size | 25×3mm,30×3mm, 32×5mm,40×3mm, 40×4mm, 40×5mm, 50×5mm (Custom sizes available). |
| Bearing Bar Spacing | 25mm,30mm,40mm,50mm,100mm(Custom sizes ) |
| Cross Bar Size | 6mm,8mm,10mm |
| Cross Bar Spacing | 25mm,30mm,50mm,100mm. |
| Surface Treatment | Hot-Dip Galvanized (HDG) |
| Surface Profile | Plain (Smooth), Serrated (Non-slip), or I-Bar. |
| Panel Dimensions | Standard Sizes: 1000 ×1000mm or 5000 ×1000mm or 1000 × 5800mm(Custom sizes available). |
| Loading Capacity | Light Duty (Pedestrian) or Heavy Duty (Vehicle/Truck traffic). |
| Applications | Used for industrial platforms, walkways, drainage covers, stair treads, and safety fencing, providing exceptional durability and corrosion resistance in harsh environments. |
Hot dipped galvanized steel grating is the preferred solution for industrial flooring systems exposed to moisture, chemicals, and aggressive outdoor environments. It is widely used in infrastructure, marine platforms, and processing facilities where long-term corrosion resistance is critical.
As a steel grating manufacturer, production follows a full hot-dip galvanizing process after fabrication, ensuring every panel is protected inside and out for reliable long-term performance.
While full customization is available, the following configurations are commonly specified in industrial and commercial projects:
| Specification Item | Common Industry Standards |
|---|---|
| Bearing Bar Sizes | 30 × 3 mm, 32 × 5 mm (Standard) / Up to 100 × 10 mm |
| Bar Spacing (Pitch) | 30 / 100 mm (Most popular), 40 / 100 mm |
| Surface Profile | Plain (Standard) or serrated |
| Protective Finish | Hot-Dipped Galvanized (ASTM A123 / ISO 1461) |
| Type | Span | Load |
|---|---|---|
| 30×3 | 1000 mm | ~300 kg/m² |
| 32×5 | 1000 mm | ~500 kg/m² |
| 40×5 | 1000 mm | ~700 kg/m² |
A Note on Customization:
If project span or load requirements exceed standard configurations, production can be tailored based on technical drawings to ensure structural integrity and performance.
The performance of galvanized steel grating depends directly on the quality of the zinc coating process.
Unlike cold galvanizing or painting, this process creates a permanent protective layer.
This is why hot dipped galvanized steel grating is widely specified in global anti-corrosion flooring systems.
Galvanized steel grating (also referred to as zinc coated steel grid) is a high-strength steel bar grating that has undergone a professional hot-dip galvanizing process.
By immersing the entire panel into molten zinc, a deep protective layer is formed across all exposed surfaces.
Compared with untreated or painted steel:
All production complies with YB/T 4001.1 standards, with coating verified according to ASTM A123 / ISO 1461.
In real-world projects, galvanized steel grating is often integrated with other grating types and installation components.
For structural strength in load-bearing areas, it is commonly used together with welded steel grating.
In safety-critical environments, serrated steel grating improves anti-slip performance.
For installation, grating clips fasteners provide secure fixing without damaging the zinc coating.
Galvanized steel grating is designed for environments where corrosion resistance is essential:
Exposure to acids, alkalis, and industrial chemicals
Requires long-term structural stability
Constant exposure to saltwater and humidity
High corrosion risk without protective coating
Moisture and chemical reactions accelerate corrosion
HDG coating significantly extends service life
Bridges, drainage covers, and public walkways
Continuous exposure to weather and environmental stress
To ensure consistent performance, each batch undergoes strict inspection:
All panels are checked to ensure compatibility with systems such as steel grating and grating stair treads.
Third-party inspection (SGS / BV) is available for export projects.
If you are sourcing galvanized steel grating for demanding environments, support is available for:
👉 Contact us today to get the latest price and technical support for your project.
Q1：What information should I provide for a Galvanized Steel Grating quotation?
A：Please provide the panel size, bearing bar size, bar spacing, cross bar spacing, surface profile, quantity, application, and load requirement. If you have drawings, span details, or installation plans, we can review them and recommend a suitable specification for your project.
Q2：How thick should the zinc coating be for outdoor grating projects?
A：For most outdoor industrial projects, a zinc coating thickness of 85μm or above is commonly recommended. For coastal, chemical, sewage treatment, or high-humidity environments, thicker coating requirements can be discussed based on service conditions and the expected corrosion resistance level.
Q3：Can galvanized bar grating be customized for different spans and loads?
A：Yes. Galvanized bar grating can be customized according to span, load capacity, bearing bar size, bar spacing, cross bar spacing, panel layout, and installation method. For heavy-duty areas or vehicle traffic, stronger bearing bars and closer spacing may be required.
Q4：Is HDG steel grating suitable for marine or coastal environments?
A：HDG steel grating is suitable for many marine, offshore, and coastal applications because the hot-dip zinc coating helps resist rust caused by moisture and salt exposure. For harsher environments, coating thickness, material grade, drainage design, and maintenance requirements should be confirmed before production.
Q5：What is the difference between hot-dip galvanized grating and painted grating?
A：Hot-dip galvanized grating is fully immersed in molten zinc, creating a metallurgical bond that protects edges, joints, and internal surfaces. Painted grating only has a surface coating, which may wear or peel more easily in outdoor, wet, or high-traffic industrial environments.
Q6：Can the grating be supplied with plain or serrated surface options?
A：Yes. Plain surface grating is suitable for general platforms, walkways, and drainage covers. Serrated surface grating is recommended for wet, oily, or safety-critical areas where stronger anti-slip performance is required, such as chemical plants, sewage treatment facilities, and outdoor maintenance walkways.
Q7：What bearing bar sizes are commonly used for galvanized steel flooring?
A：Common bearing bar sizes include 30×3 mm and 32×5 mm for standard industrial flooring. For heavy-duty platforms, equipment zones, or vehicle access areas, larger bearing bars can be used, including sizes up to 100×10 mm depending on load and span requirements.
Q8：Can zinc coated steel grid panels be made according to drawings?
A：Yes. Zinc coated steel grid panels can be manufactured according to technical drawings, including panel dimensions, cut-outs, bearing bar direction, edge banding, fixing positions, and special layout requirements. Drawing confirmation helps reduce installation errors and ensures the panels match the project structure.
Q9：How do you inspect galvanizing quality before shipment?
A：Galvanizing quality can be checked through zinc coating thickness testing, surface coverage inspection, edge and joint protection review, and visual surface inspection. These checks help confirm that the hot-dip galvanized layer is uniform and suitable for outdoor or industrial use.
Q10：What applications are suitable for anti-corrosion steel grating?
A：Anti-corrosion steel grating is suitable for chemical plants, offshore platforms, sewage treatment facilities, outdoor walkways, drainage covers, bridges, public infrastructure, and industrial flooring systems. It is especially useful in environments where moisture, chemicals, or weather exposure may cause untreated steel to rust quickly.
Q11：How is dimensional accuracy controlled during production?
A：Dimensional inspection includes checking panel length, width, bearing bar size, bar spacing, cross bar spacing, diagonal tolerance, flatness, and cut-out positions. Accurate dimensions help ensure smooth installation and proper matching with support frames, stair treads, clips, and other grating components.
Q12：How is Galvanized Steel Grating packed for export shipping?
A：Galvanized Steel Grating is usually packed in reinforced bundles with steel strapping, edge protection, and export-ready packaging. The goal is to reduce coating damage, deformation, and impact during loading, ocean transportation, and unloading. Special packing requirements can also be arranged for project orders.
Watch our factory live footage to see how hot dipped galvanized steel grating is manufactured for durable, anti-corrosion industrial flooring applications.
Steel Grating in Galvanizing
Inspection of galvanized layer thickness of steel grating products
Galvanized steel grating with side holes
Contact us today for custom HDG steel grating specifications and the latest factory price.
