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Donald McwayneGood team members always offer budget in time and answer questions with patience, great job! -
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AASHTO LRFD20 & AWS D1.5M Certified Box Girder Steel Bridge – ASTM A709 Grade 50
| Place of Origin | China |
|---|---|
| Brand Name | FASEC |
| Certification | ISO 9001; EN 1090-1 FPC; CE; AWS CWI; AISC IBR/ABR |
| Model Number | Steel Girder Bridge |
| 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
| Product Type | Custom Prefabricated Box Girder Steel Bridge | Design Standard | AASHTO LRFD Bridge Design Specifications |
|---|---|---|---|
| Welding Standard | AWS D1.5M Bridge Welding Code | Design Methodology | Load And Resistance Factor Design (LRFD) |
| Connection | High-strength Bolted (AISC 303) Or Field Welding Per AWS D1.5M | Surface Protection | Hot-dip Galvanizing (ASTM A123), Epoxy Paint, C3/C4 Coating |
| Customization | Span, Width, Girder Height, Material Grade, Deck System, Coating | Applications | Highway Overpass, Railway Crossing, Pedestrian Bridge, Heavy-load Industrial Access |
Product Description
AASHTO LRFD20 & AWS D1.5M Certified Box Girder Steel Bridge – ASTM A709 Grade 50 is a prefabricated steel bridge system tailored for highway and heavy-load infrastructure. Designed in accordance with AASHTO LRFD 9th Edition (2020) LRFD design principles and manufactured under AWS D1.5M Bridge Welding Code, the bridge adopts ASTM A709 Grade 50 high-strength low-alloy steel. It delivers excellent structural integrity and superior torsional stiffness with long service life, serving as a dependable solution for global demanding bridge projects.
AASHTO LRFD20 Compliance – Code-Recognized Structural Design
The whole structure strictly follows AASHTO LRFD Bridge Design Specifications (9th Edition, 2020) specified by the Federal Highway Administration. The LRFD system applies scientific load and resistance factor calculation to guarantee safety under all limit states. For box girder structures, design meets constructibility requirements of Article 6.11.3 to ensure safe fabrication, transportation and on-site erection. Ductility, redundancy and importance factors are fully considered, enabling visible early warning deformation before structural failure.
AWS D1.5M Standard Welding – Premium Weld Quality Assurance
All welding work complies with AASHTO/AWS D1.5M/D1.5 Bridge Welding Code, the authoritative standard for steel bridge welded connections. It covers welded joint design, workmanship requirements, welder qualification and complete inspection regulations. Our factory employs AWS-certified welders and implements systematic NDT (Non-Destructive Testing) including UT and MT inspection for all key welds. Standards in Clause 12 for fracture-critical members are fully executed to improve anti-fatigue performance of box girder joints.
ASTM A709 Grade 50 Steel – High Strength & Outstanding Machinability
We adopt ASTM A709 Grade 50 bridge-specific high-strength low-alloy steel. It reaches minimum yield strength of 345 MPa (50 ksi) and tensile strength of 450 MPa (65 ksi), with elongation above 18%. Controlled chemical composition brings stable weldability for MIG, TIG and manual arc welding. Custom Charpy impact testing is available for fracture-critical and non-fracture-critical sections to adapt to low-temperature service environments.
Prefabricated Box Girder System – High Torsional Stiffness & Fast Erection
The closed box girder section features inherent high torsional rigidity, much better than open I-girders, making it ideal for curved routes and long-span bridges. Enhanced structural rigidity reduces vibration and optimizes driving comfort. All components are prefabricated in factory to precise dimensions with positioning marks for field assembly. Matching cross frames ensure accurate fit-up. Factory prefabrication effectively cuts site labor workload and shortens overall construction cycle.
Versatile Applications
Highway bridges: Straight and curved highway crossing structures- Urban overpasses & flyovers: Compact layout to minimize traffic disruption
- Railway bridges: Satisfies heavy load and anti-fatigue requirements
- Pedestrian & cycle bridges: Supports customized aesthetic designs
- Industrial access bridges: Widely used in ports, mines and heavy industrial zones
- Coastal bridges: Compatible with enhanced anti-corrosion treatment options
Quality Assurance & Full Traceability
• Raw material procurement: Mill-certified suppliers with complete traceability- • Incoming inspection: Chemical composition, mechanical performance and dimensional check complying with ASTM A709
- • Welding management: Complete WPS/PQR qualification according to AWS D1.5M
- • On-product testing: Visual inspection, UT and MT non-destructive testing
- • Final acceptance: Overall dimension verification and coating inspection
- • Document delivery: Full set of mill test reports supplied with each shipment
- • Production system: ISO 9001:2015 certified workshop to guarantee stable quality and on-time delivery
Compliance & Certification at a Glance
| Aspect | Standard / Requirement | Our Commitment |
|---|---|---|
| Design Code | AASHTO LRFD Bridge Design Specifications (9th Ed., 2020) | Full compliance including Article 6.11.3 constructibility clauses |
| Welding Standard | AWS D1.5M/D1.5 Bridge Welding Code | Certified welders, qualified procedures, UT/MT inspection following Clause 12 |
| Structural Steel | ASTM A709 Grade 50 (345 MPa minimum yield) | Mill certified, full traceability, optional Charpy impact testing |
| Fabrication Management | ISO 9001:2015 | In-process inspection and precise dimensional control |
| Testing Items | NDT, visual inspection, mechanical test | Ultrasonic, magnetic particle and coating thickness inspection |
| Technical Documents | MTR, welding records, inspection logs | Complete traceable documents provided upon delivery |
Conclusion – Trusted Certified Partner for Bridge Infrastructure
AASHTO LRFD20 & AWS D1.5M Certified Box Girder Steel Bridge – ASTM A709 Grade 50 integrates standardized code design, certified welding technology and high-performance structural steel. The prefabricated box girder system delivers fast site assembly and reliable mechanical performance, applicable to global highway, overpass and heavy infrastructure projects.
Get started with your project: Contact our engineering team for customized design support, competitive quotations and complete technical documents. We provide free technical consultation, official shop drawings and global logistics arrangements to keep your project on schedule.
Choose full compliance. Choose reliable quality. Choose our certified box girder steel bridge.
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