Hot-Dip Galvanized Steel Drainage Grating High Flow Capacity Industrial Pavements
Designed for industrial drainage challenges, our Hot-Dip Galvanized Heavy-Duty Steel Drainage Grating combines rugged durability with exceptional water management. Constructed from 5mm-thick Q355B steel flat bars, the grating features 25mm-wide slots and an 83% open area, achieving a flow rate of 15 m³/h per m² – 3x faster than concrete drains. The hot-dip galvanized finish (85μm zinc coating) resists oil, chemicals, and abrasion, making it ideal for truck yards, fuel stations, and wastewater treatment facilities.
| Parameter | Details |
| Material | Q355B carbon steel, hot-dip galvanized |
| Flat Bar Size | 50x5mm (standard), 60x6mm for extreme loads |
| Slot Width | 25mm (optimized for debris retention while maximizing flow) |
| Load Capacity | Static load: 20 tons/m² (truck traffic); impact load: 10 tons (drop test) |
| Flow Rate | 15 m³/h per m², suitable for 100-year storm events |
| Corrosion Resistance | Passed 2,000-hour salt spray test (ASTM B117), pH 2-12 chemical resistance |
| Panel Size | Standard: 2000x1000mm, 4000x1000mm (custom lengths up to 6000mm) |
- Heavy-Duty Fabrication:
- Flat bars are plasma-cut and deburred for precision slot spacing (25mm ±1mm).
- Cross bars welded at 100mm intervals using robotic welding (weld strength ≥5kN per joint).
- Galvanization for Harsh Environments:
- Dual-layer process: First zinc immersion for corrosion protection, then epoxy primer for chemical resistance (optional for industrial zones).
- Debris Retention Design:
- Slots angled at 15° to trap larger debris (≥30mm) while allowing water to pass through, reducing maintenance frequency.
- Quality Assurance:
- Load testing with 20-ton hydraulic press to simulate truck traffic.
- Flow rate measured in controlled rainfall simulations
- Rapid Water Removal: 83% open area prevents water pooling, critical for safety in wet industrial environments.
- Debris Management: Angled slots reduce clogging, cutting maintenance costs by 50% compared to traditional grates.
- 20+ Year Warranty: Galvanized coating withstands heavy machinery, oil spills, and saltwater.
- Impact Resistance: Survives 10-ton dropped pallet tests without deformation, meeting NCHRP 350 standards for highway applications.
- Modular Design: Lightweight panels (32kg/m²) lift by hand, speeding installation by 40% vs. concrete drains.
- Lower Lifecycle Cost: 40% cheaper than cast iron grates over 20 years, with zero replacement costs for rust damage.
- Chemical Resistance: Suitable for capturing oil/chemical spills in compliance with EPA stormwater regulations.
- Industrial Pavements: Truck yards, aircraft hangars, and factory driveways.
- Infrastructure Drainage: Highway medians, bridge decks, and tunnel entrances.
- Wastewater Facilities: Treatment plant walkways, sump covers, and drainage channels.
- Commercial Sites: Parking garages, fuel station aprons, and outdoor dining areas prone to flooding.
Q1: Can this grating handle acidic wastewater?
A: Yes. The optional epoxy coating provides pH 2-12 resistance, suitable for chemical plant drainage.
Q2: What is the maximum vehicle weight it can support?
A: The 60x6mm flat bar model supports up to 40-ton trucks when installed on 200mm centers.
Q3: How do I prevent debris from blocking the slots?
A: Use our optional debris baskets (sold separately) or specify 15mm slots for fine debris control.
Q4: Can I get a sample with custom slot spacing?
A: Yes. Free 1m² samples with your specified slot width are available within 7 working days.
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