Prefabricated Box Girder Steel Bridge Aashto Aws D1.5m Certified

Product Description

Prefabricated Box Girder Steel Bridge AASHTO AWS D1.5M Certified is a mature heavy-duty steel bridge solution widely adopted in global transportation infrastructure.
• The closed box cross-section structure delivers outstanding torsional stiffness and high bending resistance.
• All girder segments are prefabricated inside factory workshops to stabilize fabrication quality.
• Fully compliant with AASHTO design specifications and AWS D1.5M welding requirements.
• Widely applied for medium-span highway bridges, urban viaducts and grade separation projects.

Structural Advantages

1.High torsional stiffness: Closed box structure effectively resists deformation caused by asymmetric live loads.
2.Excellent bearing capacity, suitable for routes with heavy vehicle traffic.
3.Prefabricated manufacturing shortens on-site construction cycle and reduces field labor cost.
4.Neat exterior structure, easy for daily inspection and routine maintenance.
5.Flexible structural layout, adaptable for both straight and curved bridge alignments.

Fabrication Quality Control
1.Raw steel materials pass strict incoming inspection before cutting, assembling and welding work.
2.All welding operations are completed by certified welders following AWS D1.5M.
3.Critical full-penetration welds adopt UT and MT non-destructive testing to detect internal defects.
4.Comprehensive dimensional inspection after assembly ensures all tolerances meet AASHTO standard limits.

Anti-Corrosion Protection System

• Hot-dip galvanizing: Ideal selection for inland areas and mild marine service environment.
• Multi-layer anti-corrosion paint coating: Supports customized coating thickness and surface color.
• Strict surface pretreatment before coating to guarantee strong coating adhesion.
• All anti-corrosion processes are implemented under standardized operating procedures.

Design & Customization Service
• Accept customized design according to client's engineering drawings and technical brief.
• Adjustable parameters include span length, girder height, deck width and design load rating.
• Engineers can optimize girder segmentation to balance transportation feasibility and installation efficiency.
• Provide technical calculation support to match local infrastructure design codes.

Installation Guidance Notes
• Prefabricated girder segments are connected on site via high-strength bolts or field welding.
• Lifting points are reserved during factory fabrication for convenient hoisting operation.
• We can supply standard connection drawing reference for construction contractors.
• Installation sequence can be optimized to improve overall construction progress.

Application Scope
• Highway medium-span bridges and intercity traffic crossings
• Municipal urban viaducts and grade separation overpasses
• Permanent traffic bridges for industrial zones and port access roads
• Suitable for new construction and bridge reconstruction projects

Specification

Parameter	Detailed Information
Girder Structure Type	Single box or multi-cell box girder structure
Governing Standards	AASHTO Bridge Specifications; AWS D1.5M Bridge Welding Code
Available Steel Grade	Q355B, S355JR and equivalent structural steel
Segment Form	Separately prefabricated girder segments for transportation
Weld Inspection Standard	Mandatory NDT testing for critical load-bearing welds
Customizable Items	Span length, girder height, deck width, load rating, connection type

Packaging & Shipping

• All prefabricated box girder segments will be thoroughly cleaned before packaging.
• Protective padding is arranged on contact areas to prevent surface scratches during transit.
• Lifting lugs are pre-installed to support safe loading and unloading operations.
• Components are firmly fixed on transport frames to avoid shifting during shipment.
• Goods can be shipped by flat rack containers or bulk vessels according to component dimensions.
• Segmentation scheme can be optimized to improve container utilization upon request.
• Package dimensions and weights are customized based on project segmentation design.

After Sales Service

• Provide full-cycle continuous technical support for global overseas customers.
• Engineering team offers fabrication drawing consultation and technical explanation.
• Third-party inspection is acceptable at every production stage.
• Timely written technical guidance is provided when meeting on-site assembly difficulties.
• All bridge components are manufactured under strict international quality management standards.

Company Profile

We are a professional steel structure manufacturer based in China. Hangzhou FAMOUS Steel Engineering Co., Ltd. owns rich experience in engineering steel bridge fabrication. Our workshop implements standardized production system certified by international management systems. We are capable of producing various prefabricated steel bridge structures following AASHTO, AWS and European standards. We serve global clients focusing on highway, municipal and infrastructure projects. We strictly control raw material quality, welding workmanship and dimensional accuracy, providing reliable customized steel bridge solutions for overseas engineering partners.