Full Locked Coil Stay Cable Systems on the Bridge of Sighs (Fuente Vaqueros, Granada)

The construction of cable-stayed bridges for key civil engineering infrastructure, such as the Bridge of Sighs in Fuente Vaqueros (Granada), demands high-precision engineering components capable of managing critical tensions and continuous dynamic loads. The technical challenge of this project was to guarantee deck stability and maximum durability against corrosion, while maintaining a visually lightweight, elegant design seamlessly integrated into the urban and natural environment of Granada.

We supplied the main stay cable systems using Full Locked Coil type for the bridge structure. The core feature of this solution lies in its Z-profile outer wires, which mechanically interlock to form a hermetic, closed outer barrier. This closed design naturally protects the inner core against moisture and contaminant ingress, while delivering a high modulus of elasticity with minimal elongation under heavy tensile stress.

What is a Full Locked Coil cable for cable-stayed bridges?

It is a high-density structural cable composed of Z-profile outer wires that interlock to form a smooth, airtight surface. It is the preferred technical solution for long-span cable-stayed bridges and footbridges due to its superior corrosion resistance, high load capacity, minimal elongation under tension, and sleek architectural integration.

Technical and Engineering Highlights of the Project:

• Corrosion Protection and Long Service Life: The closed structure of locked coil cables prevents water and moisture from reaching the inner core, ensuring optimal structural performance for decades with minimal maintenance.
• Load Capacity and Dimensional Rigidity: Its high modulus of elasticity ensures bridge deck stability against dynamic vibrations and continuous traffic loads without compromising structural alignment.
• Aesthetic Finish and Urban Integration: The smooth, homogeneous outer profile of the stay cables provides a clean, modern architectural aesthetic, enhancing the municipal environment while complying with civil engineering safety standards.