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Heavy-duty Welded Bent Metal Low-carbon Structure Transportation Project Steel Bridge
Our steel structure bridge is manufactured with high-strength heavy steel materials and advanced welding technology. Featuring high structural rigidity, strong bearing capacity, seismic resistance and wind resistance, it adapts to complex terrain and harsh natural environments. Professional anti-corrosion, rust-proof and weather-resistant treatment greatly extends the service life. With fast on-site installation, low comprehensive maintenance cost and flexible design, our steel bridges are widely used for highway crossings, river spans, municipal engineering and industrial transit. Customized span, load standard and overall solution are available to meet diverse engineering project requirements.
Technical Specifications
Span Range
50-160 M
Altitude Band
15-50 M
Anti-corrosion Treatment
Galvanizing, spraying zinc, and spraying anti-corrosion paint
Fire-protection Rating
Higher than or equal to Level 2
Load Type
Enclosure materials, equipment, cranes, local natural conditions
Material Intensity
S355/Q235/Q355
Tolerance
±1
Standard
Chinese Standard/European Standard
Process Mode
Bending, welding, cutting, assembling, shot blasting and painting
Drawing Design
SAP2000/AutoCAD/PKPM/3D3S/TEKLA
Certificate
CE
Life Length
50 years
Packaging and Delivery
Port
Qingdao, TianJin, and HeBei
Delivery Cycle
15-60 Days
Marketing Unit
Square meter
Supply Capacity
10,000 tons/month
Key Features
50-Year Lifespan & Long-Term Durability
High-quality structural steel (Q355q, Q420q, EN S355/S420 series) with excellent toughness and anti-fatigue performance. Professional anti-corrosion treatment (hot-dip galvanizing + epoxy zinc-rich primer + fluorocarbon topcoat) per ISO 12944 standards, ensuring 50-year service life.
121+ Mph Wind Resistance
Optimized modular truss structure with triangular framework design effectively distributes wind load. Wind resistance reaches 121+ Mph (195+ km/h), meeting requirements for hurricane-prone areas with 1.2x safety factor.
Modern Design & Modular Prefabrication
Modern minimalist design with sleek appearance. Modular prefabrication enables factory standardized production (error ≤±1mm) and reduces construction period by 40%-60% compared to traditional methods.
High Efficiency & Cost-Saving
Modular design allows flexible combination and expansion, reducing material waste and transportation costs. Lightweight structure minimizes foundation investment and saves labor costs.
Core Technology
Modular Truss Structure Technology: Triangular truss framework evenly distributes tensile and compressive forces, suitable for spans up to 91 meters with standardized interfaces for seamless assembly.
Precision Prefabrication & Welding Technology: Advanced CNC equipment with welding compliant to EN ISO 15614 and AWS D1.5 standards. 100% welding qualification rate with component precision meeting EN 10210/EN 10219 standards.
Anti-Corrosion & Durability Enhancement: Three-layer anti-corrosion system (hot-dip galvanizing + epoxy zinc-rich primer + fluorocarbon topcoat) with ≥80μm galvanizing layer and Z-direction performance steel.
Wind Resistance Optimization: Streamline truss section and aerodynamic diversion device reduce wind resistance and vortex-induced vibration, ensuring safe operation under extreme conditions.
International Standards & Key Parameters
Parameter Category
Key Specifications
International Standards
Certification
CE Certification (EXC3 Execution Class), ISO 9001, AWS D1.5
EU CPR (EU 305/2011), EN 1090-1/2, ISO 9001, AWS D1.5
Our prefabricated modular steel truss bridges are widely used in various infrastructure projects, including highway and railway crossings, urban overpasses, cross-river and cross-valley bridges, industrial zone passages, emergency rescue bridges, and remote area traffic links. They are especially suitable for areas with strong wind, high humidity, and complex construction environments.
Manufacturing Process
Processing follows international standards (AISC 360, Eurocode 3, EN 1090) ensuring structural stability
Strict raw material inspection including material certificate verification, size measurement and appearance inspection
Lofting, marking and cutting performed by numerical control equipment for precise dimensions
Straightening and correction (thermal or mechanical) to ensure component flatness
Drilling and punching processes to meet assembly requirements
Professional welding (submerged arc welding, gas shielded welding) with UT/MT non-destructive testing
Secondary straightening and grinding to correct deformation and remove burrs
Shot blasting to Sa2.5 derusting grade for enhanced coating adhesion
Clear component marking, proper packaging and factory delivery
