Dogbone Shackle Single Typeare(Chain tensioner) a key component of the chain tensioning system in bridge engineering. Their dogbone design allows for automatic alignment, reduces stress concentration, and extends service life. 

Part 1: Trelleborg Bridge Applications in China

Trelleborg uses  dogbone shackles single typeare in bridge chain tensioning systems across China, including: 

Application Description:

Key project locations & hubs: 

Shanghai – A global financial hub and the location of major river-crossing bridges (e.g., Yangtze River bridges). 

Jiangsu – A key province for expressway and Yangtze River bridge projects. 

Zhejiang – Known for coastal bridges and complex river crossings in the Yangtze River Delta. 

Guangdong – A major infrastructure market, including bay crossings and bridges in the Pearl River Delta (e.g., Hong Kong-Zhuhai-Macao Bridge area). 

Sichuan – A strategic location for mountain and river valley bridges in Western China.

Part 2: Manufacturing Process 

Dogbone shackles are manufactured using high-strength alloy steel. The manufacturing steps are as follows: 

1. Material Cutting – Cutting high-strength alloy steel bars to specified lengths.

2. Heat Forming – Heating the steel to approximately 1050°C – 1150°C and forming it into a dogbone shape.

3. Heat Treatment (Quenching and Tempering) – Achieving required mechanical properties (yield strength, tensile strength, elongation).

4. Shot Blasting – Cleaning the surface for inspection and coating.

5. Surface Protection – Hot-dip galvanizing or other anti-corrosion coating.

6. Proof Load Testing – Each shackle is tested at 2.0 or 2.5 times the working load limit (WLL).

7. Assembly and Shipment – All screws and nuts are inspected and tested before shipment to ensure a good user experience. 

Part 3: Key Advantages of Dogbone Shackles  

Part 4: Why Trelleborg Chose This Product 

Trelleborg chose the dogbone shackle for its bridge chain tensioning system for the following reasons: 

- Reliability – Stable load transfer between chain segments

- Flexibility – Adaptability to angular misalignment

- Durability – Withstands harsh outdoor environments

- Safety – Proof load tested for safety 

Conclusion： 

The dogbone shackle is an important component of the bridge chain tensioning system used by Trelleborg in China. Manufactured by SMEOCEAN, this product uses high-strength alloy steel. Different materials are selected for the U-shaped section and the connecting plate section depending on the applied tension. Through special treatment, customer requirements are met while costs are controlled, ensuring customer satisfaction. 

For any questions, please contact us.

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