Composite Steel Grating Factory Direct | Steel Checker Plate Composite / FRP Fiberglass | Anti-Slip & Enclosed Dual Function | Meeting Industrial Platform & High-Corrosion Environment Requirements
In industrial platform design, have you ever faced this dilemma: Steel grating offers good ventilation but has openings—worried about tools falling through? Checker plate is anti-slip but too heavy, increasing the burden on steel structures? And in highly corrosive environments, metal grating requires frequent replacement, with maintenance costs remaining high?
Composite steel grating provides the perfect solution to both challenges.
With 20 years of deep cultivation in the steel grating field, we operate both steel checker plate composite production lines and FRP (Fiberglass Reinforced Plastic) molded manufacturing workshops. Based on your application scenario, we offer two completely different “composite” solutions—eliminating your confusion in product selection.
Important Note: The Difference Between Two Types of “Composite Steel Grating”
Before we begin, we need to clarify a common industry misconception: products marketed as “composite steel grating” actually come in two completely different types, with entirely distinct materials, processes, and application scenarios:
| Type | Material Composition | Core Features | Application Scenarios |
| Steel Checker Plate Composite | Steel grating as base + checker plate as surface, welded together | High-strength load-bearing + enclosed anti-slip surface | Pedestrian overpasses, tool operating platforms, locations where openings are not permitted |
| FRP Fiberglass Composite | Unsaturated polyester resin matrix + alkali-free fiberglass reinforcement | Lightweight high-strength + excellent corrosion resistance + insulation | Chemical plants, electroplating facilities, offshore platforms, wastewater treatment plants |
Please select the corresponding product type based on your actual requirements. We can provide both and recommend the optimal solution for you.
Part 1: Steel Checker Plate Composite Grating – Enclosed Anti-Slip + High Load-Bearing
Product Definition
Steel checker plate composite grating is a composite product formed by combining steel grating with certain load-bearing capacity as the base plate, welded together with a surface checker plate. It utilizes both the anti-slip, opening-free characteristics of checker plate and the excellent load-bearing capacity of steel grating. Compared to using checker plate alone with steel section supports, it significantly reduces material costs and structural self-weight.
Core Advantages
✅ Enclosed Surface – Prevents Objects from Falling Through
In special applications (e.g., pedestrian overpasses, operating platforms), ISO industrial platform standards explicitly prohibit liquid accumulation and do not allow openings. The checker plate surface of steel checker plate composite grating is completely enclosed, effectively preventing tools and components from falling, protecting equipment and personnel below.
✅ 40% Increased Load Capacity, 30% Reduced Structural Self-Weight
Using high-strength steel grating such as G323/40/100 as the base, covered with 3-6mm checker plate. Compared to pure checker plate + steel section support solutions, this composite structure uses less steel, is lighter, and costs less under the same load conditions.
✅ Excellent Anti-Slip Performance
The surface checker plate features innate anti-slip patterns, with a friction coefficient exceeding 0.7. Even in wet or oily environments, it maintains stable grip, making it especially suitable for locations with high anti-slip requirements such as pedestrian overpasses and stair treads.
✅ Rapid Drainage Design
Although the surface is enclosed, scientific drainage slope design achieves a drainage area of up to 83.3% , effectively preventing water accumulation and reducing slip risks.
Specifications & Selection
We offer standard composite steel grating series, as well as deep customization based on requirements:
| Model | Total Thickness (mm) | Checker Plate Thickness (mm) | Base Steel Grating Specification | Max Span for Pedestrian Load (mm) |
| DGP23 | 23 | 3 | DG205/40/100 | 1100 |
| DGP28 | 28 | 3 | DG255/40/100I | 1300 |
| DGP35 | 35 | 3 | DG325/40/100I | 1600 |
| DGP41 | 41 | 3 | DG385/40/100I | 1900 |
| DGP47 | 47 | 3 | DG445/40/100I | 2100 |
| DGP53 | 53 | 3 | DG505/40/100I | 2400 |
Note: The above are the most common standard specifications. 4mm, 5mm, or 6mm checker plate, or other steel grating base specifications, can also be used. The “P” in the model number represents composite grating.
Application Scenarios
Pedestrian overpasses, walkways: Enclosed surface prevents objects from falling, ensuring pedestrian safety
Equipment operating platforms: Prevents tools and components from falling and damaging equipment below
Maintenance walkways: Balances load-bearing and anti-slip requirements
Stair treads: Checker plate surface provides excellent anti-slip performance
Part 2: FRP Fiberglass Composite Grating – Lightweight Corrosion-Resistant + Maintenance-Free
Product Definition
FRP fiberglass composite grating is a composite product manufactured through a special molding process, using unsaturated polyester resin as the matrix and alkali-free fiberglass as reinforcement material. It is not metal, yet it possesses strength exceeding metal and corrosion resistance far superior to metal.
Why Choose FRP Grating?
In environments with corrosive liquids and gases (such as electroplating plants, chemical plants), metal components corrode at an alarming rate. Even with protective coatings, frequent shutdowns for maintenance are required. The effectiveness of FRP grating in these areas has been validated by over 30 years of promotion in the United States and has been proven to be the most economical and reasonable material.
Six Core Advantages
✅ Exceptional Corrosion Resistance – 50 Years Without Rust
Possesses superior resistance to acids, alkalis, organic solvents, salts, and numerous gaseous and liquid media—unparalleled superiority in the anti-corrosion field. Based on actual application requirements, different resin types (orthophthalic, isophthalic, vinyl ester) can be economically selected as the matrix.
✅ Lightweight with High Strength – Only 1/4 Weight of Steel
Density approximately 1.8g/cm³, only 1/4 of steel and 2/3 of aluminum. Its strength is 10 times that of rigid PVC, with absolute strength exceeding aluminum and ordinary steel levels. Lightweight significantly reduces foundation support requirements, lowering engineering material costs.
✅ Insulating & Non-Magnetic – Safe and Reliable
Excellent electrical insulation—no breakdown at 10KV voltage. Non-magnetic, suitable for use with magnetically sensitive equipment. The special structure of FRP grating also offers anti-slip and anti-fatigue properties.
✅ Excellent Flame Retardancy
Standard flame retardant grating: Flame spread index (ASTM E-84) ≤ 25. Advanced flame retardant vinyl ester grating: Flame spread index ≤ 10, Oxygen Index (OI) ≥ 28 (GB 8924).
✅ Rich Colors – Enhances Environment
Colors can be freely selected: yellow, black, gray, green, blue, red, even transparent or translucent. Colors can be customized according to customer requirements, improving the workplace environment.
✅ Aging Resistant – 50+ Years Service Life
Theoretically, service life exceeds 50 years. In reconstruction projects in the Gulf region and Middle Eastern oil fields, FRP grating has been recognized by experts as the most economical and reasonable material and is widely used.
Specifications & Selection Guide
Common Thickness Options
25mm thickness: Suitable for medium loads such as car washes, electroplating equipment plants
38mm thickness: Suitable for heavy loads or high-corrosion environments such as wastewater treatment plants, chemical plants
Standard Dimensions
Standard panel size: 1.22m × 3.66m, can be cut and processed
Resin Type Selection
| Resin Type | Application Scenarios | Corrosion Resistance Level |
| Orthophthalic | General corrosive environments, cost-effective | ⭐⭐⭐ |
| Isophthalic | Moderate corrosive environments, excellent comprehensive performance | ⭐⭐⭐⭐ |
| Vinyl Ester | Strong acids/alkalis, high temperature/humidity environments | ⭐⭐⭐⭐⭐ |
Application Scenarios
FRP grating is widely used in corrosive environments:
| Industry | Application Scenarios |
| Petrochemical | Work platforms, equipment platforms, drilling platforms, walkways |
| Electroplating / Printing & Dyeing | Electroplating line operating platforms, walkways around cleaning tanks |
| Wastewater Treatment | Filter plates, packing supports, tank top covers, walkways |
| Marine Engineering | Ship decks, offshore platform walkways |
| Power Industry | Cooling tower platforms, substation walkways |
| Food / Pharmaceutical | Clean workshop operating platforms, cleaning areas |
| Civil Construction | Car wash load-bearing plates, tree grate covers, landscape boardwalks |
How to Select the Right Composite Grating for Your Project
Step 1: Determine Application Environment
Indoor/outdoor, no strong corrosion → Steel checker plate composite (economical and practical, high load-bearing)
Strong acids/alkalis, marine climate, insulation required → FRP type (corrosion-resistant, maintenance-free)
Step 2: Determine Load Requirements
Pedestrian load, light equipment → Choose DGP23-DGP35 series
Heavy equipment, vehicle passage → Choose DGP41-DGP53 series
FRP grating: 25mm thick for standard loads, 38mm thick for heavy loads
Step 3: Confirm Special Requirements
-Is it needed? openings or edge banding?
-Is it needed specific colors? (FRP offers multiple color options)
-Is there any explosion-proof, insulation, or other special requirements?
Step 4: Provide Drawings or Requirements
Provide your application scenario, load requirements, and installation method.
Our technical team will deliver professional solutions and quotations within 24 hours.
Why Do Global Buyers Choose Us as Their Long-Term Supplier?
✅ Dual Production Line Capability
We simultaneously operate steel checker plate composite production lines and FRP molding production lines, enabling us to provide the most suitable solution based on your actual requirements—avoiding the embarrassed of “ordering FRP with steel grating drawings.”
✅ Full Industry Chain Control
From raw material procurement to finished product shipment, every工序 is strictly controlled. Steel composite products use Q235B/Q355B high-quality steel, with weld strength reaching 300MPa+ . FRP products use premium resin + alkali-free fiberglass, ensuring long-term corrosion resistance.
✅ Rigorous Quality Inspection
Steel composite products: Weld strength testing, galvanized coating thickness inspection (≥85μm)
FRP products: Barcol hardness testing, oxygen index testing, corrosion resistance performance testing
✅ Global Project Experience
Our composite grating has been applied in:
Municipal engineering: Composite steel grating projects for pedestrian overpasses in multiple cities
Petrochemical: FRP operating platforms in large refining and chemical enterprises
Marine engineering: FRP grating systems for coastal boardwalks
Electroplating industrial parks: Full coverage of FRP walkways in centralized electroplating areas
Procurement & Installation Guide
Steel Checker Plate Composite Installation Methods
Welded fixing: Directly weld the composite steel grating to the supporting steel structure; apply two coats of zinc-rich paint at welds
Bolt fixing: Use stainless steel mounting clamps or bolts; does not damage the galvanized coating
Vibration areas: Welding or adding rubber pads recommended to prevent loosening
FRP Installation Characteristics
Simple cutting and installation—no hot work or large lifting equipment required
Only minimal labor and power tools needed
Can be cut and drilled on-site, adapting to various irregular shape requirements
Precautions
Steel composite plates may warp after hot-dip galvanizing, especially larger models; flattening is difficult—please consider this during selection
Installation间隙 generally recommended at 100mm
[Get Your Custom Composite Grating Solution Today]
Stop being confused about “steel or FRP.” Stop compromising on “openings or excessive weight.”
Choosing our composite steel grating means choosing the professional solution that best matches your working conditions.
Click here to contact our engineers. Inquire today for free selection advice and material sample comparisons!
