Product Overview
Welded Steel Grating Trench Cover Plate is a high-strength, heavy-duty drainage cover solution manufactured from premium steel grating panels using advanced resistance welding technology. It is designed to cover drainage channels, trenches, pits, and access openings in industrial, commercial, and municipal applications.
Engineered with excellent load-bearing capacity, superior drainage efficiency, anti-slip safety properties, and exceptional corrosion resistance, welded steel grating trench cover plates provide a reliable and durable solution for areas exposed to pedestrian traffic, heavy vehicles, forklifts, and industrial machinery.
We manufacture and export customized welded steel grating trench cover plates worldwide. We deliver tailored solutions in various dimensions, load ratings, materials, and surface treatments strictly complying with international engineering standards including ISO, ASTM, EN, and BS.
Technical Specifications
|
Specification Item |
Technical Details & Options |
|
Product Name |
Welded Steel Grating Trench Cover Plate |
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Manufacturing Standards |
YB/T 4001.1, ANSI / NAAMM MBG 531, BS 4592, AS 3996, BS EN 124 |
|
Material Grades |
Carbon Steel (Q235B / ASTM A36 / EN 10025 S235JR) or Stainless Steel (SS304 / SS316) |
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Manufacturing Process |
Automated Resistance Electro-Forging Welding |
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Bearing Bar Types |
Plain Flat Bar / Serrated Anti-Slip Bar |
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Cross Bar Types |
Twisted Square Bar / Round Bar / Flat Bar |
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Bearing Bar Size (H x T) |
Height: 20mm - 100mm | Thickness: 3mm, 4mm, 5mm, 6mm, 8mm (Customizable) |
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Bearing Bar Pitch |
30mm, 40mm, 60mm (Customizable) |
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Cross Bar Pitch |
50mm, 100mm (Customizable) |
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Surface Treatments |
Hot-Dip Galvanized (ISO 1461 / ASTM A123) / Powder Coated / Painted / Mill Finish |
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Galvanizing Zinc Coating |
Average equal to or greater than 610 g/m2 (Coating Thickness equal to or greater than 85 um) |
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Load Capacity Ratings |
Light Duty (Pedestrian) / Medium Duty (Light Vehicle) / Heavy Duty (H20/H25 Truck, Forklift, Port Equipment) |
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Frame & Accessories |
Angle Iron Frame, Anchor Lugs, Grating Fastener Clips, Locking Device |
Product Features and Advantages
Exceptional Load-Bearing Capacity
• Heavy Vehicle Rated: Designed for H20 and H25 vehicle loading, heavy forklifts, and industrial machinery according to AASHTO and BS EN 124 standards.
• Customizable Specs: Bearing bar depths from 20mm to 100mm and thicknesses from 3mm to 8mm match any structural trench span.
• Zero Deformation: Robust structural matrix ensures long service life under continuous dynamic traffic impact.
Robust Resistance Welded Structure
• High Shear Resistance: Bearing bars and cross bars are fused under high voltage electro-forging, meeting ANSI / NAAMM MBG 531 standards.
• Vibration Resistant: Unified rigid structure prevents rattle, loosening, or permanent displacement over years of heavy use.
• Low Maintenance: Engineered for decades of worry-free industrial operation.
High-Efficiency Drainage & Ventilation
• Up to 80% Open Area: Maximizes rapid surface water and stormwater runoff during storm events or heavy washdowns.
• Anti-Clogging Design: Open mesh layout minimizes dirt, debris, and leaf accumulation.
• Enhanced Airflow: Excellent choice for underground utility channels and pit covers requiring continuous ventilation.
Anti-Slip Surface for High-Risk Areas
• Serrated Bar Design: Deep-notched bearing bars provide maximum traction in wet, oily, chemical, or icy environments.
• OSHA Compliance: Significantly reduces slip-and-fall risks for factory personnel and pedestrians.
Long-Lasting Corrosion Protection
• Heavy Hot-Dip Galvanizing: Exceeds ISO 1461 and ASTM A123 standards with an average zinc coating weight equal to or greater than 610 g/m2 (85 um).
• Harsh Environment Tested: Ideal for coastal marine facilities, chemical processing plants, and wastewater treatment infrastructure.
Product Types & Applications
Plain Welded Cover: Features a smooth surface ideal for standard municipal drainage, walkways, and commercial facilities. (Best For: Sidewalk drainage, commercial plazas, indoor parking areas)
Serrated Anti-Slip Cover: Designed with notched bearing bars for maximum anti-slip performance in wet or oily areas. (Best For: Chemical processing plants, offshore platforms, oil refineries, food processing facilities)
Heavy-Duty Vehicle Cover: Reinforced structural design engineered to withstand severe wheel loads from trucks, trailers, and heavy machinery. (Best For: Highways, logistics hubs, airports, container ports, warehouses)
Global Project References
Our trench cover plates have been successfully deployed in major international infrastructure and industrial projects:
Western Australia Iron Ore Port: Heavy-duty 100mm \times 8mm serrated grating covers engineered for high dynamic axle loads in dusty mining environments.
Saudi Arabia Petrochemical Complex: Hot-dip galvanized trench covers (85um+ coating) serving outdoor chemical drainage channels under high-heat and saline conditions.
Southeast Asia Logistics Hub: Standard plain welded covers installed across a 12,000m² distribution center drive-lane network.
Quality Assurance & Third-Party Inspection
We enforce rigorous quality control at every stage of production to guarantee project compliance:
Raw Material Inspection: Mill Test Certificates (MTC) supplied for all steel batches.
Weld Integrity Testing: Non-destructive shear strength and visual weld joint inspection.
Galvanizing Thickness Audit: Magnetic coating thickness gauge testing on every batch (85 um minimum).
Third-Party Testing Welcome: Fully compliant with SGS, TUV, and BV pre-shipment inspections upon client request.
Packaging and Global Logistics
To ensure long-distance ocean freight protection, we use heavy-duty export packaging:
High-Tensile Steel Bundling: Reinforced steel strapping with edge protectors.
Heavy Steel Pallets: Designed for fork-truck loading and easy container stuffing/unloading.
Moisture-Proof Wrapping: Multi-layer plastic wrap guards against salt spray and ocean humidity.
Container Loading Optimization: Maximize 20ft / 40ft GP container space utilization to minimize client freight costs.
FAQ
Q: How do I select the correct bearing bar size for my trench span?
A: Selection depends on three primary factors: Clear Trench Span, Load Type (Pedestrian, Light Vehicle, Heavy Truck, or Forklift), and Allowable Deflection. Send us your trench span and load requirements, and our engineering team will provide free structural load calculations within 24 hours.
Q: What is your standard Minimum Order Quantity (MOQ) and Lead Time?
A: MOQ: Flexible MOQ starting at 50 square meters or 1 standard bundle for stock specifications.
Lead Time: Standard orders are shipped within 15 to 20 days after deposit approval and CAD drawing sign-off.
Q: What is the standard zinc coating thickness for hot-dip galvanized covers?
A: Our standard hot-dip galvanizing complies strictly with ISO 1461 and ASTM A123, achieving a minimum average zinc coating thickness of 85 um (equal to or greater than 610 g/m2), ensuring a 20 to 50-year service life depending on environmental conditions.
Q: Can you supply complete supporting angle frames and accessories?
A: Yes, we supply complete trench cover systems including embedded angle iron frames, anchor lugs, locking mechanisms, and grating fastener clips for quick field installation.
Q: Do you accept third-party quality inspection before shipment?
A: Absolutely. We regularly accommodate third-party inspection agencies such as SGS, TUV, or BV to inspect dimensions, welding quality, coating thickness, and loading capacity at our factory prior to dispatch.
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