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Hot-dip Galvanized AASHTO LRFD Steel Arch Bridge for Coastal Traffic Infrastructure

  • Hot-dip Galvanized AASHTO LRFD Steel Arch Bridge for Coastal Traffic Infrastructure
  • Hot-dip Galvanized AASHTO LRFD Steel Arch Bridge for Coastal Traffic Infrastructure
  • Hot-dip Galvanized AASHTO LRFD Steel Arch Bridge for Coastal Traffic Infrastructure
  • Hot-dip Galvanized AASHTO LRFD Steel Arch Bridge for Coastal Traffic Infrastructure
  • Hot-dip Galvanized AASHTO LRFD Steel Arch Bridge for Coastal Traffic Infrastructure
Place of Origin China
Brand Name FASEC
Certification ISO 9001; AWS D1.5M Certified; AWS CWI; AISC IBR/ABR
Model Number Steel Arch Bridges
Minimum Order Quantity 100 MT
Price USD 1,000-1,500/MT
Packaging Details Sea Freight (Container/Bulk Vessel)
Delivery Time 30-60 Days
Payment Terms L/C, D/A, D/P, T/T
Supply Ability 5,000-15,000 MT/Year
Product Details
Design Standard AASHTO LRFD Bridge Design Specifications Welding Code AWS D1.5M Bridge Welding Code
Steel Grade ASTM A709 Grade 50 (50W, HPS 70W Optional) Weld Inspection 100% UT On Primary Load-carrying Welds
Applications Urban Transport Infrastructure, Long-span Bridges Customization Customized To Project Requirements
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Product Description
The Hot-dip Galvanized AASHTO LRFD Steel Arch Bridge is a high-performance, shop-integrated prefabricated bridge superstructure system, specially developed for coastal traffic infrastructure projects with strict anti-corrosion requirements. Designed to AASHTO LRFD and manufactured in full compliance with AWS D1.5M welding specifications, the bridge adopts closed-box arch ribs to realize reliable long-span crossing performance.
Its core advantage lies in the premium hot-dip galvanized coating implemented per ASTM A123 / AASHTO M111 standards. The metallurgically bonded zinc-iron alloy coating forms a durable protective layer for the steel structure, effectively resisting erosion from high humidity, salt spray and marine corrosive media. With fully prefabricated modules and bolted field connection technology, the bridge achieves rapid on-site construction while meeting full North American industry regulatory compliance.
 
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Coastal Protection – Hot-Dip Galvanizing Advantage

 

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Superior Corrosion Resistance: The HDG process forms a tight metallurgical zinc-iron alloy coating on the steel surface, isolating the steel substrate from humid, salt-laden coastal air and seawater splash to prevent rust and structural deterioration.
  • Active Sacrificial Protection: The zinc coating provides continuous cathodic protection. Even if local scratches or coating damage occur, the surrounding zinc will corrode preferentially to protect the exposed steel structure.
  • Extended Service Life: Standard HDG coatings can deliver 60+ years of stable effective protection in conventional coastal environments, significantly reducing later maintenance frequency and overall project life-cycle costs.
  • Custom Duplex Coating Solution: For extremely harsh marine corrosion environments, an optional duplex coating system (HDG + protective paint) is available to maximize structural durability and anti-corrosion performance.
  • Authoritative Standard Compliance: All galvanizing processes strictly follow ASTM A123 / AASHTO M111, the core North American industry standards for hot-dip galvanizing of fabricated steel structures.
  • Standardized Galvanized Connection Design: Complying with AASHTO LRFD Article 6.13.2.8, HDG faying surfaces are classified as Class C with a slip coefficient µ = 0.30 and long-term creep reduction factor Kc = 0.80, ensuring stable slip resistance of bolted connections throughout the service life.
     

Key Specifications

 
Parameter Details
Design Standard AASHTO LRFD Bridge Design Specifications
Welding Code AWS D1.5M Bridge Welding Code
Galvanizing Standard ASTM A123 / AASHTO M111
Arch Section Type Closed-box section with internal stiffeners
Steel Grade ASTM A709 Grade 50 (Grade 50W, HPS 70W optional)
Design Live Load HL-93 (standard design truck + lane load)
Galvanized Connection Parameter Class C friction surface (µ = 0.30), creep factor Kc = 0.80 (per AASHTO LRFD Article 6.13.2.8)
Welding NDT Standard 100% ultrasonic testing (UT) for all primary load-carrying welds
Field Connection Mode High-strength bolted connection, no on-site welding required
Design Service Life 75 – 100+ years
 

AASHTO LRFD & AWS D1.5M Compliance


  • AASHTO LRFD Full Compliance: Adopts Load and Resistance Factor Design methodology, fully verifying strength, service, fatigue and extreme limit states based on HL-93 live load standard. All steel structure designs strictly comply with Section 6 of AASHTO LRFD specifications, covering flexure, shear, combined mechanical actions, fatigue resistance and fracture control.
  • AWS D1.5M Welding Compliance: Implements the strict bridge-specific welding code (stricter than general AWS D1.1 standard). All fracture-critical member welds undergo 100% UT non-destructive testing. All welders hold valid AWS certification, and certified CWI welding inspectors supervise the entire production process.
  • Seismic Design Compliance: Seismic performance design follows AASHTO LRFD seismic provisions, applicable to all conventional steel arch bridge structures.
  • Long Lifespan Guarantee: Achieves a design service life of 75–100+ years under standardized operation and routine maintenance.
     

Fabrication & Quality Assurance


  • Raw Material Certification: Adopts certified ASTM A709 Grade 50 structural steel, with complete official Mill Test Reports (MTRs) for batch traceability.
  • Standardized Welding Production: All welding works are completed by AWS-certified welders. WPS/PQR are fully qualified in accordance with AWS D1.5M requirements.
  • Strict NDT Inspection: 100% ultrasonic testing (UT) is implemented for all primary load-bearing welds; MT/PT inspections are applied for auxiliary welds and key components as required.
  • Standardized Hot-Dip Galvanizing: All steel components are hot-dip galvanized in strict accordance with ASTM A123 / AASHTO M111 standards, with full molten zinc immersion to form a uniform, defect-free metallurgical coating.
  • Professional Structural Optimization: Reserved venting and draining holes ensure full zinc coverage of component surfaces, effectively avoiding coating defects and structural deformation during galvanizing.
  • Pre-Assembly Verification: Full one-side pre-assembly completed before galvanizing to verify the accuracy of all component sizes and connection interfaces.
  • Third-Party Supervision: Supports third-party inspection and certification by authoritative institutions such as SGS, Bureau Veritas, or client-designated inspection teams.
  • Complete Technical Documentation: Provides full project dossiers including design calculation documents, steel MTRs, WPS/PQR, NDT test reports, galvanizing certification, coating thickness detection reports and as-built drawings.
     

Conclusion – Coastal-Ready, AASHTO Certified


The Hot-dip Galvanized AASHTO LRFD Steel Arch Bridge integrates excellent coastal corrosion resistance, high structural efficiency and fast on-site installation capability, serving as an optimal solution for coastal traffic infrastructure construction. Fully certified by AASHTO LRFD, AWS D1.5M, and ASTM A123 galvanizing standards, the product delivers core advantages as follows:
  • • Stable metallurgically bonded anti-corrosion coating, supporting 60+ years of reliable service in coastal environments
  • • Full AASHTO LRFD compliance, realizing universal regulatory acceptance across North America
  • • High structural bearing capacity, adapting to HL-93 standard live load and heavy-duty highway traffic
  • • Prefabricated modular design with bolted connections, greatly shortening construction cycle
  • • Complete standardized technical documentation, convenient for project approval and acceptance
Send us your project requirements – including bridge span, width and specific site conditions. We will provide AASHTO-compliant professional design schemes, detailed galvanizing specifications and fixed formal quotations within 48 hours.
 
Hot-dip galvanized for coastal resilience – your reliable steel bridge solution starts here.
 

 

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