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Product Positioning

Focused on complex urban viaducts and interchange bridges with wide decks, small-radius curves, and bifurcated sections, offering two cross-section configurations: single-box multi-cell and multi-box single-cell, suitable for bridge widths of 12–25 meters and spans of 40–120 meters.

Core Advantages

Closed-section cross-sections have extremely high torsional stiffness, so curved bridges require no additional torsional structures; construction can use the push-launching method or assembly on scaffolds, allowing it to span busy roads below without affecting existing traffic.

Global Compliance

Strictly meets mainstream international standards including European Standards (EN 1993-1-5 Plate Buckling and EN 1993-2 Steel Box Beam Distortion), American Standards (AASHTO LRFD Appendix B Orthotropic Plate Fatigue and AWS D1.5 Welding), and Australian Standards (AS 5100.4 Box Girder Flange Width-Thickness Ratio and AS 5100.6 Composite Deck).

Service Assurance

Provides full-cycle technical support from distortion buckling analysis, cross-frame spacing optimization, push-launching construction simulation, to orthotropic plate U-rib-to-deck weld fatigue verification and on-site circumferential welding solutions.

Our Box Girder Steel Bridge delivers exceptional structural rigidity, long-term durability, and low-maintenance performance for permanent highway, railway, and urban crossings. Engineered for heavy loads and long spans, it is the ideal choice for high-traffic routes and challenging environments.

Product Positioning:Focused on urban elevated highways and interchange bridges with complex alignments such as wide bridge decks, small-radius curves, and branching sections, offering two cross-section configurations: single-box multi-cell and multi-box single-cell, suitable for bridge widths of 12–25 meters and spans of 40–120 meters.

Core Advantages:Closed-section cross-sections have extremely high torsional stiffness, so curved bridges require no additional torsional structures; construction can use the push-launching method or assembly on scaffolds, allowing it to span busy roads below without affecting existing traffic operations.

Global Compliance:Strictly meets major international standards, including European standards (EN 1993-1-5 thin plate buckling and EN 1993-2 steel box girder distortion), American standards (AASHTO LRFD Appendix B orthotropic plate fatigue and AWS D1.5 welding), and Australian standards (AS 5100.4 box girder flange width-thickness ratio and AS 5100.6 composite deck).

Service Guarantee:Provides full-cycle technical support from distortion buckling analysis, diaphragms spacing optimization, push-launching construction simulation, to orthotropic plate U-rib-to-deck weld fatigue checks and on-site circumferential weld solutions.

Our Box Girder Steel Bridge delivers superior structural rigidity, long-term durability, and low-maintenance performance for permanent highway, railway, and urban crossings. Engineered for heavy loads and long spans, it is ideal for high-traffic routes and challenging environments.

Product Categories: Straight steel box girder, curved box girder, variable cross-section box girder, multi-cell steel box girder

Global Compliance: AASHTO LRFD 2020, AS5100, EN 1993 Eurocode 3, ASTM A709, EN 1090 / ISO 3834 certified

Core Performance: High torsional rigidity, lightweight structure, large-span capability, superior wind & seismic resistance

Anti-Corrosion Solution: Sa2.5 blasting grade, multi-layer paint system, hot-dip galvanized & thermal zinc spraying available

Project Service: Custom design, factory pre-assembly, NDT inspection, global logistics & on-site technical guidance

Product Positioning：Targeting medium to large-span bridge projects, we provide standardized and customized steel structure bridge solutions with steel box girders as the core load-bearing components.

Core Advantages：Lightweight, high bending and torsional stiffness, short construction period, and easy transportation and quick on-site assembly, significantly reducing foundation costs.

Application Scenarios：Widely used in highway overpasses, urban elevated roads, railway bridges, pedestrian bridges, and mountainous canyon areas that require high spanning capability and fast construction speed.

Service Guarantee ：Providing full-chain technical services from conceptual design, steel structure detailing, factory prefabrication, anti-corrosion coating, to on-site installation guidance and quality inspection.

• Standards: AASHTO LRFD (American Association of State Highway and Transportation Officials Load and Resistance Factor Design), EN 1993-2 (Eurocode 3 Part 2 – Design of Steel Structures for Bridges), AS 5100 (Standards Australia Bridge Design Code Series), ASTM A709
• Materials: ASTM A709 Gr.50/Gr.70, S355JR/S460, Q355B (GB/T 1591 Low Alloy High Strength Structural Steel)
• Design: Custom single/double box girder, integral/segmental prefabrication, anti-corrosion integrated design
• Dimensions: Span 10–80m, width 3.5–12m (customizable)
• Features: High rigidity, low maintenance, fast erection, suitable for heavy load
• Applications: Highways, urban roads, bridges, overpasses, industrial passages
• Services: Custom design, quality inspection, ocean packaging, global logistics & technical guidance

• Closed box structure with strong overall rigidity, torsion & seismic resistance, stable and safe for long-span and curved scenarios.
• Prefabricated in factory with fine manufacturing, high precision, stable quality, fast on-site installation, greatly shortening construction period.
• Lightweight high-strength design, lighter self-weight, effectively reducing foundation cost and improving project economy.
• Professional anti-corrosion protection system, aging & fatigue resistant, long service life, low later maintenance cost.
• Flexible and customizable alignment, simple and beautiful appearance, balancing traffic function and urban landscape effect.

· Standards Compliance: Engineered to AASHTO LRFD, ASTM A709 & AWS D1.5/D1.1 codes

· Span Range: Optimized for main spans 200m–500m

· Structural Performance: High torsional rigidity for curved & skewed bridges

· Weight Advantage: 30–50% lighter than concrete bridges

· Construction Speed: Prefabricated modular design for fast installation

• Closed box structure, excellent torsion and bending resistance, suitable for various complex working conditions.
• Light self-weight and low foundation cost, greatly reducing the overall project investment.
• Factory prefabrication + on-site rapid installation, shortening the construction period and realizing investment return in advance.
• Corrosion-resistant and durable, low maintenance cost, outstanding cost performance throughout the life cycle.
• Flexible shape customization, combining practicality and landscape, suitable for multi-scenario needs.

Product Positioning:Providing high torsional stiffness steel box girder solutions specially designed for long-span highway bridges, urban viaducts, rail transit, and cross-sea bridges, suitable for curved and skewed alignments.

Core Advantages:The closed-box cross-section offers excellent torsional stiffness and lateral stability, effectively adapting to curved bridges, skew bridges, and eccentric load conditions; factory prefabrication in segments and on-site assembly can significantly shorten construction cycles and reduce the risk of working at height on-site.

Global Compliance:Strictly meets mainstream international standards including European standards (EN 1993-2 Steel Bridge Design and EN 1090 Manufacturing with CE marking), American standards (AASHTO LRFD Bridge Design Specifications and AWS D1.5 Bridge Welding), and Australian standards (AS 5100 Bridge Series and AS 1554 Steel Structure Welding).

Service Assurance:Provides full-process technical support from cross-section optimization design, buckling and fatigue checks, segment division and transportation planning, to on-site welding and temporary support system design.