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The Metal Drainage Ditch is a linear drainage system designed for large-area water collection and diversion, fabricated with galvanized steel, 304/316L stainless steel, or aluminum alloy—its modular structure (length 1-3m/section) enables quick assembly and adapts to complex site layouts. Unlike concrete ditches that crack in 2-3 years, it withstands ground settlement (≤20mm) and temperature fluctuations (-40°C to 80°C), with service life up to 20+ years. It supports flow rates up to 150L/s (300mm width) and complies with DIN 18531 standards, making it ideal for roads, airports, and commercial plazas.
High Flow Capacity: Channel width from 100mm to 500mm and depth 150-400mm, with open area accounting for 40-60% of total surface. A 300mm-wide 316L ditch achieves 150L/s flow, handling 20-year rainstorm intensity (100mm/h) without overflow.
Settlement-Resistant Structure: Flexible joint design (rubber gaskets + stainless steel clamps) accommodates ground settlement up to 20mm and lateral movement up to 10mm. In a German highway project, it maintained integrity after 15mm settlement, while concrete ditches cracked.
Durable Material Options: Galvanized steel (zinc coating ≥80μm) for cost-sensitive projects (service life 10+ years); 316L stainless steel (corrosion rate <0.01mm/year) for coastal/chemical areas; aluminum alloy (weight 2.7kg/m²) for rooftop drainage (reduces structural load by 60%).
Low Maintenance Design: Smooth inner wall (Ra < 0.4μm) prevents sediment adhesion—cleaning frequency is once per quarter vs. monthly for concrete ditches. Removable grilles (lockable optional) allow easy access, with cleaning time < 10 minutes/section.
Road & Highway Engineering: Side drainage for urban roads and highways. A Chinese highway used 200mm-wide galvanized ditches, handling 80L/s rainwater and reducing road flooding by 90%—traffic accidents related to hydroplaning dropped by 75%.
Airport Runways: Drainage for taxiways and aprons. A Middle Eastern airport adopted 300mm-wide 316L ditches, withstanding jet fuel spills and 80°C tarmac temperatures. The system removed 150L/s water, ensuring runway safety during heavy rain.
Commercial Plazas & Parks: Landscape drainage for public areas. A Singapore plaza used 150mm-wide aluminum ditches with decorative grilles, blending with landscaping and handling 50L/s rainwater—no flooding reported during monsoon season.
Q: Which material is best for coastal areas?
A: 316L stainless steel is mandatory for coastal areas, as its molybdenum content resists salt spray (corrosion rate <0.01mm/year). Galvanized steel rusts in 1-2 years in coastal environments, while aluminum alloy requires anodization (adds $5-10/m cost).
Q: How to connect ditch sections tightly?
A: Use rubber gaskets (EPDM for -40°C to 80°C) and stainless steel clamps (8.8-grade). Apply silicone sealant (temperature range -50°C to 200°C) at joints—this achieves IP67 waterproof rating and prevents leakage (≤0.1L/h). Torque clamps to 20 N·m for optimal sealing.
Q: Can it be installed under asphalt roads?
A: Yes, choose D400 load class (400kN) and embed in concrete bedding (thickness ≥100mm). The ditch’s top edge should be 5mm below asphalt surface—this prevents damage from heavy vehicles and ensures water flows into the channel.
Q: What’s the maximum joint spacing for long ditches?
A: Standard joint spacing is 1-3m/section; for ditches over 50m, use 1m sections to accommodate thermal expansion (expansion rate 11.7×10⁻⁶/°C for steel). Add expansion joints every 20m—each absorbs 10mm length change.
The Metal Drainage Ditch is a linear drainage system designed for large-area water collection and diversion, fabricated with galvanized steel, 304/316L stainless steel, or aluminum alloy—its modular structure (length 1-3m/section) enables quick assembly and adapts to complex site layouts. Unlike concrete ditches that crack in 2-3 years, it withstands ground settlement (≤20mm) and temperature fluctuations (-40°C to 80°C), with service life up to 20+ years. It supports flow rates up to 150L/s (300mm width) and complies with DIN 18531 standards, making it ideal for roads, airports, and commercial plazas.
High Flow Capacity: Channel width from 100mm to 500mm and depth 150-400mm, with open area accounting for 40-60% of total surface. A 300mm-wide 316L ditch achieves 150L/s flow, handling 20-year rainstorm intensity (100mm/h) without overflow.
Settlement-Resistant Structure: Flexible joint design (rubber gaskets + stainless steel clamps) accommodates ground settlement up to 20mm and lateral movement up to 10mm. In a German highway project, it maintained integrity after 15mm settlement, while concrete ditches cracked.
Durable Material Options: Galvanized steel (zinc coating ≥80μm) for cost-sensitive projects (service life 10+ years); 316L stainless steel (corrosion rate <0.01mm/year) for coastal/chemical areas; aluminum alloy (weight 2.7kg/m²) for rooftop drainage (reduces structural load by 60%).
Low Maintenance Design: Smooth inner wall (Ra < 0.4μm) prevents sediment adhesion—cleaning frequency is once per quarter vs. monthly for concrete ditches. Removable grilles (lockable optional) allow easy access, with cleaning time < 10 minutes/section.
Road & Highway Engineering: Side drainage for urban roads and highways. A Chinese highway used 200mm-wide galvanized ditches, handling 80L/s rainwater and reducing road flooding by 90%—traffic accidents related to hydroplaning dropped by 75%.
Airport Runways: Drainage for taxiways and aprons. A Middle Eastern airport adopted 300mm-wide 316L ditches, withstanding jet fuel spills and 80°C tarmac temperatures. The system removed 150L/s water, ensuring runway safety during heavy rain.
Commercial Plazas & Parks: Landscape drainage for public areas. A Singapore plaza used 150mm-wide aluminum ditches with decorative grilles, blending with landscaping and handling 50L/s rainwater—no flooding reported during monsoon season.
Q: Which material is best for coastal areas?
A: 316L stainless steel is mandatory for coastal areas, as its molybdenum content resists salt spray (corrosion rate <0.01mm/year). Galvanized steel rusts in 1-2 years in coastal environments, while aluminum alloy requires anodization (adds $5-10/m cost).
Q: How to connect ditch sections tightly?
A: Use rubber gaskets (EPDM for -40°C to 80°C) and stainless steel clamps (8.8-grade). Apply silicone sealant (temperature range -50°C to 200°C) at joints—this achieves IP67 waterproof rating and prevents leakage (≤0.1L/h). Torque clamps to 20 N·m for optimal sealing.
Q: Can it be installed under asphalt roads?
A: Yes, choose D400 load class (400kN) and embed in concrete bedding (thickness ≥100mm). The ditch’s top edge should be 5mm below asphalt surface—this prevents damage from heavy vehicles and ensures water flows into the channel.
Q: What’s the maximum joint spacing for long ditches?
A: Standard joint spacing is 1-3m/section; for ditches over 50m, use 1m sections to accommodate thermal expansion (expansion rate 11.7×10⁻⁶/°C for steel). Add expansion joints every 20m—each absorbs 10mm length change.
