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Ultimate Challenge! First Steel Truss Girder Successfully Installed for the World’s Longest Cross-Sea Railway Bridge
June 17, 2026
On June 4, a major milestone was achieved for the Hangzhou Bay Cross-Sea Railway Bridge, a key control project of the Nantong-to-Ningbo (Tong-Yong) High-Speed Railway. At the construction site located 15 kilometers offshore on the Cixi side of Hangzhou Bay, a massive steel truss girder—measuring 84 meters long, 15 meters wide, 14 meters high, and weighing a staggering 1,291 tons—was precisely positioned.
This successful operation marks the official transition of the South Channel Bridge of this world’s longest cross-sea railway bridge under construction from the substructure construction phase to the superstructure main body construction phase. The seamless completion of this ultra-large component lifting operation was fully powered and secured by the 1,300-ton specialized girder lifting beam and high-performance, high-strength cable systems independently developed by Julisling, safeguarding a critical node of this mega national infrastructure project with hard-core technology.
The Engineering Challenge: Lifting in a World-Class Extreme Marine Environment
The Hangzhou Bay Cross-Sea Railway Bridge stretches 29.2 kilometers and serves as a core hub engineering project for China’s “Eight Vertical and Eight Horizontal” high-speed railway network along the coastal corridor. Hangzhou Bay is renowned as one of the world’s three strongest tidal bays, presenting an environment characterized by extreme hydrological and meteorological complexities that pose unprecedented challenges to lifting heavy steel truss girders:
- Violent Winds & Massive Tides: Approximately 180 days per year experience strong winds of Grade 6 or above, with a maximum tidal range reaching nearly 9 meters.
- Millimeter-Level Precision: Lifting the S1 segment—the first ultra-large superstructure component of the South Channel Bridge—demanded millimeter-level precision amidst turbulent forces, placing ultimate requirements on equipment stability, bearing capacity, and weather resistance.
The Julisling Solution: Custom 1,300-Ton Heavy-Duty Lifting System
To conquer these unprecedented engineering barriers, Julisling utilized its deep technical expertise in mega-project lifting to deliver a tailor-made 1,300-ton specialized lifting beam and high-strength cable system:
| Equipment Component | Core Engineering Highlights |
| 1,300-Ton Specialized Lifting Beam | Manufactured from ultra-high-strength materials and subjected to rigorous mechanical performance testing and simulated marine environment trials. It perfectly matched the 1,291-ton load while providing generous safety margins. |
| High-Performance Cable System | Engineered with advanced properties featuring superior anti-tensile, anti-impact, and anti-marine corrosion performance, ensuring long-term stable operations under high-velocity winds and high-salinity conditions. |
Strategic Significance: Accelerating “Yangtze River Delta on Tracks”
The newly constructed Nantong-to-Ningbo High-Speed Railway has a total length of 301 kilometers and features 10 stations. Upon completion, it will connect multiple core cities across Jiangsu and Zhejiang provinces. This project holds immense strategic significance for forging the “Yangtze River Delta on Tracks,” optimizing the regional rail network structure, and driving the high-quality integrated development of the Yangtze River Delta region.
As a leading enterprise in China’s rigging and lifting industry, Julisling has long been deeply involved in the nation’s major infrastructure milestones. From the Hong Kong-Zhuhai-Macao Bridge to the Shenzhen-Zhongshan Link, from the Shanghai-Suzhou-Nantong Yangtze River Rail-Road Bridge to the current Hangzhou Bay Cross-Sea Railway Bridge, Julisling continues to overcome world-class engineering and lifting obstacles through independent innovation, demonstrating the robust core strength of “Made in China.”
