Space Frame Steel Structure

Record-Breaking 6-Month Construction of Curved Steel Box Girder Bridge Nears Completion​

2025.5.6 Rizhao city – Qingdao Zhuzhiyuan Steel Structure Co.,Ltd., a global leader in precision steel engineering, is proud to announce the near-completion of an innovative ​curved steel box girder bridge, a landmark project showcasing cutting-edge modular construction and unmatched efficiency. Built in just ​six months, this engineering feat exemplifies the synergy of advanced design and industrial precision.

​Project Highlights​

​1. Revolutionary Box Girder Design​

The bridge’s ​steel box girder system​ features a sleek curved profile, blending aesthetics with structural resilience. Its multi-layered steel framework—composed of interlocking horizontal and vertical elements—ensures load distribution efficiency and wind resistance, while the deep-gray corrosion-resistant panels highlight its industrial elegance.

​2. Speed and Precision​

From production to installation, the bridge was completed in ​just six months, a testament to Qingdao Zhuzhiyuan Steel Structure Co.,Ltd’s proprietary modular construction techniques. Pre-fabricated segments, including pre-welded trusses and galvanized panels, were precision-engineered for rapid assembly, minimizing onsite labor by 50%.

​3. Urban Integration​

Situated at a critical urban junction, the ​steel box girder bridge​ seamlessly integrates transit-oriented development (TOD) principles, linking high-density residential zones with commercial districts while maintaining structural synergy with the surrounding skyline. The bridge’s aerodynamic curved profile—engineered to meet AASHTO LT-14 load standards—optimizes wind resistance and visual cohesion, with its cold-formed box sections fabricated to BS EN 1090-2 compliance.

Currently in the final phases of structural assembly, the project highlights precision-engineered bolted connections and modular construction methodology. The bridge’s grid-truss system, supported by pre-stressed diaphragms, demonstrates advanced load distribution efficiency, while hot-dip galvanized coatings (HDG 850g/m²) ensure 50-year corrosion resistance. As the structure nears completion, it serves as a vital civic artery, streamlining urban mobility and reinforcing regional connectivity.

Current Progress​

Structural Completion: Over 95% of the steel framework is installed, with crews finalizing welding and surface treatments. The bridge’s iconic curve, visible in the adjacent residential towers’ reflections, is now fully assembled.

Surface Finishing: Anti-corrosion coatings and fire-retardant finishes are being applied to ensure durability in urban environments.

Final Touches: Lighting systems and pedestrian walkways are slated for installation, ahead of the bridge’s grand opening.

​Engineering Innovations​

​Modular Construction: Prefabricated in Qingdao Zhuzhiyuan Steel Structure Co.,Ltd.’s high-tech workshop (featured in the background of on-site images), the bridge’s components were designed for seamless integration, reducing waste by 30%.

Sustainability: Galvanized coatings (HDG 850g/m²) and recycled steel content (40%) ensure longevity and eco-friendly performance.

Smart Design: The box girder’s hollow section optimizes weight-to-strength ratios, enabling spans of up to 100 meters without intermediate supports.

​Vision for the Future​

This bridge is more than infrastructure—it’s a symbol of urban progress. Designed for adaptability, its modular system allows future expansions or conversions into mixed-use pathways, supporting the city’s evolving needs.

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For over 16 years, Qingdao Zhuzhiyuan Steel Structure Co.,Ltd.has redefined steel engineering through innovations like the 6-month box girder bridge. Our expertise spans spatial structures, modular systems, and sustainable solutions, delivering projects that blend durability, beauty, and speed.