Galvanized steel trench grates are engineered to support heavy vehicular or pedestrian traffic while allowing for adequate drainage and ventilation. They are a safe and maintenance-free solution for long-term use in harsh environments, making them an industry standard in high-demand sectors like construction, mining, petrochemicals, transportation, and public utilities.

2. Technical Data Sheet (TDS)

3. Features and Benefits

✅ High Load Capacity

Galvanized trench covers are designed to handle a wide range of loads, from pedestrian zones to areas exposed to forklifts, trucks, and even aircraft. The structural design and load bar selection ensure optimal strength-to-weight ratio.

✅ Corrosion Resistance

The hot-dip galvanization process forms a protective zinc coating that resists corrosion from water, chemicals, salts, and harsh weather, extending the product's lifespan and reducing maintenance.

✅ Drainage and Ventilation

Open grating structure allows rainwater, industrial liquids, and other fluids to flow freely into trenches while also allowing ventilation in cable ducts and service channels.

✅ Anti-Slip Options

Serrated surface bars are available to increase traction, minimizing the risk of slips and falls in wet or oily environments—ideal for safety-critical applications.

✅ Custom Fit and Modular Design

Modular trench covers can be customized in shape, size, and strength to fit specific trench dimensions, ensuring an efficient, safe, and aesthetic installation.

✅ Easy Installation and Maintenance

Lightweight yet strong design simplifies handling, installation, and removal. The modular nature allows easy access to underlying utilities without needing to dismantle the entire system.

✅ Fire and Impact Resistant

Steel grating offers natural fire resistance and superior impact strength compared to plastic, fiberglass, or concrete alternatives.

4. Common Types of Trench Grating Covers

a. Open Grating Trench Cover

• Standard grating design with open slots.

• Best for drainage and ventilation applications.

• Common in roads, pavements, manufacturing, and airports.

b. Checkered Plate Covered Grating

• Steel grating covered with a solid checkered or diamond plate.

• Used in areas where complete coverage is required to prevent dirt or debris from entering the trench.

c. Lockable Grating Cover

• Incorporates hinges or locking mechanisms.

• Suitable for utility zones, telecom lines, or electrical ducts where security is a concern.

d. Recessed Grating Covers

• Designed to be infilled with concrete, pavers, or tiles.

• Used in architectural or aesthetic applications to blend into pavements.

5. Applications

Galvanized steel trench covers are widely used in:

• Urban infrastructure: Roadsides, pedestrian walkways, highway drainage

• Industrial facilities: Factories, warehouses, chemical plants

• Power & energy sectors: Cable tray covers in substations, power plants

• Water treatment plants: Channel and basin covers

• Airports and ports: Runoff drainage and maintenance access

• Parking lots and garages: Heavy-duty vehicular trench drainage

• Commercial buildings: Landscaping, fountains, and garden drainage

6. Standards and Classifications

The trench cover system is classified by load-bearing capacity based on EN 124:

You can also refer to AASHTO H-20 / H-25 standards for U.S. projects requiring specific vehicle load classes.

7. Product Customization

Galvanized steel trench covers can be tailored to your needs:

• Material choice: Q235, Q345, SS304, SS316

• Surface type: Plain, serrated, or checkered plate

• Finish: Galvanized, painted (custom color), or untreated

• Shapes: Straight, curved, angled, T-junctions, or radial

• Accessories: Frames, lifting handles, locking devices

8. Manufacturing Process

1. Raw Material Preparation – Steel flat bars and twisted rods or round bars are cut and prepared.

2. Assembly – Cross bars are inserted through slots in bearing bars using welding or pressure-locking.

3. Welding – Fully welded at intersections to ensure strength and durability.

4. Framing – Steel angle or flat bar frame welded around the edge.

5. Galvanizing – Entire assembly is hot-dip galvanized for long-term corrosion protection.

6. Finishing – Surface inspection, quality control, and optional anti-slip nosing or lifting lugs.

9. Packaging and Delivery

• Packaging: Bundled with steel strips, wrapped with waterproof material for overseas shipping.

• Optional: Palletized, wooden crates, or custom packaging available.

• Delivery Time: 7–20 days depending on order volume and customization.

• Shipping Methods: Sea freight, air cargo, or express delivery for urgent projects.

10. Quality Assurance

• QC Process: Raw material inspection → Welding quality → Galvanization thickness → Final inspection

• Certifications: ISO 9001:2015, SGS, BV, TUV (as per customer request)

• Third-Party Inspection: Available upon request

11. Environmental & Safety Considerations

• Sustainable: Steel is 100% recyclable. Galvanizing extends lifespan, reducing replacement frequency.

• LEED Credits: Eligible under LEED and other green building rating systems.

• Worker Safety: Serrated surfaces and non-slip nosing options help meet workplace safety regulations.

12. Maintenance Guidelines

• Routine Inspection: Check for loose fittings, corrosion spots, and debris blockage.

• Cleaning: Use water or pressure washing; avoid acidic or abrasive cleaning agents.

• Repair: Minor galvanizing damage can be touched up with zinc-rich epoxy.

• Replacement: Modular design allows replacing individual covers rather than the entire line.

13. Advantages Over Other Trench Cover Materials

14. Case Studies / Project References

• Shanghai Airport Stormwater Drainage
  
  Installed D400-rated galvanized trench grates along 5 km of airport runway drainage.

• Petronas Oil Refinery (Malaysia)
  
  Used stainless steel grating trench covers for chemical-resistant cable trenching.

• Johannesburg Cityscape Project
  
  Custom recessed trench covers filled with granite to blend with urban paving.

15. Frequently Asked Questions (FAQ)

Q1: Can I request a specific load rating?

A: Yes, grating can be designed to meet EN 124 or AASHTO ratings.

Q2: Is this product slip-resistant?

A: Serrated bearing bars offer anti-slip properties ideal for slippery zones.

Q3: Can I order non-galvanized trench covers?

A: Yes, bare steel or painted finishes are available on request.

Q4: Can the trench cover be locked?

A: Yes, options for hinges and padlock systems are available for security.

Conclusion

The Galvanized Steel Grating Trench Cover is a high-performance solution for trench safety, drainage, and infrastructure access across multiple industries. Combining strength, durability, anti-corrosion performance, and safety features, it stands as a superior alternative to traditional covers. Fully customizable and compliant with global standards, it is an essential component in modern infrastructure design.