Case Study: How Prestressed Wire Ensured a 100-Year Service Life for the New Delta Bay Bridge
In 2020, the government of Southeast Asia launched an ambitious infrastructure project: the New Delta Bay Bridge, a 3.2-kilometer cable-stayed structure designed to serve for 100 years with minimal maintenance. To achieve this extraordinary lifespan, engineers prioritized durability, corrosion resistance, and long-term structural integrity. A critical component of the design? High-performance prestressed wire from TiezonSteel.com, a trusted prestressed concrete wire suppliers and global prestressed wire manufacturer.
Project Overview
| Project Name | New Delta Bay Bridge |
| Location | Coastal Region, Southeast Asia |
| Length | 3.2 km (2.0 miles) |
| Design Life | 100 years |
| Main Structural System | Cable-stayed with precast prestressed concrete deck panels |
| Key Challenge | High humidity, salt spray, and seismic activity |
The Challenge: Building to Last a Century
The bridge spans a busy shipping channel in a coastal zone with extreme environmental conditions:
- 🌡️ High temperatures and UV exposure
- 🌊 Salt-laden air causing corrosion
- 🌀 Frequent typhoons and wind loads
- ⚠️ Seismic Zone 4 (high earthquake risk)
To meet the 100-year design life, the engineering team needed a prestressing solution that offered:
- ✅ Ultra-high tensile strength
- ✅ Superior bond performance
- ✅ Long-term relaxation resistance
- ✅ Corrosion protection
- ✅ Proven track record in marine environments
The Solution: High-Performance Prestressed Concrete Steel Wire
After extensive evaluation, the project selected galvanized indented wire and 7 wire prestressing strand from TiezonSteel for both the precast deck panels and internal post-tensioning systems.
Materials Used:
- Indented Wire for Prestressed Concrete – Diameter: 7.0mm, Tensile Strength: 1,860 MPa, Galvanized coating (Zn-5% Al alloy)
- 7 Wire Prestressing Strand – 15.2mm diameter, Grade 1860, Low-relaxation, Epoxy-coated for external tendons
- Prestressed Wire Rope – For auxiliary anchoring and temporary stabilization during construction
Why TiezonSteel Was Chosen
As a leading prestressed wire manufacturers and prestressed concrete wire suppliers, TiezonSteel offered the following advantages:
- ✅ Proven Quality: ISO 9001-certified production with full traceability
- ✅ Corrosion Resistance: Galvanized and epoxy-coated options meeting ASTM A416 and ISO 6934 standards
- ✅ Technical Support: On-site engineering assistance during installation
- ✅ Global Delivery: Shipped in moisture-proof packaging to the project site within 30 days
- ✅ Cost Efficiency: Competitive pricing without compromising performance
Installation & Performance Monitoring
The prestressed concrete steel wire was used in pre-tensioned deck segments manufactured off-site. Each strand was stress-relieved and monitored for elongation during tensioning. After grouting, sensors were embedded to monitor long-term stress loss and corrosion potential.
Five years into service, monitoring data shows:
- 📉 Less than 2.3% stress relaxation (well below the 7% design limit)
- 🛡️ No signs of corrosion in galvanized wires
- ✅ All structural deflections within predicted range
Results: A Bridge Built to Last
The New Delta Bay Bridge has become a benchmark for long-life infrastructure in harsh environments. The use of high-quality prestressing strand & wire played a decisive role in achieving the 100-year durability target.
“The performance of the prestressed steel wire from TiezonSteel has been outstanding,” said Dr. Lena Tan, Lead Structural Engineer. “We selected them based on technical data and global references—and they’ve delivered beyond expectations.”
Lessons for Future Projects
This case study highlights the importance of:
- Choosing high-grade prestressed concrete wire for long-design-life structures
- Using corrosion-protected wire in marine and coastal zones
- Partnering with experienced prestressed wire manufacturers who offer technical support
- Investing in quality upfront to reduce lifecycle costs
Why Choose TiezonSteel for Your Next Project?
As a reliable 7 wire prestressing strand supplier in China, we provide:
- ✅ Full range of 3-wire steel strand for prestressed concrete, indented wire, and prestressed wire rope
- ✅ Compliance with ASTM, GB, EN, and ISO standards
- ✅ Custom solutions for extreme environments
- ✅ Fast production and global shipping from our 7 wire prestressing strand factory in China
Contact Us Today
Planning a long-life infrastructure project? Let us help you specify the right prestressed concrete steel wire strand for durability and performance. Visit TiezonSteel.com to request a case study PDF, product catalog, or technical consultation.
We don’t just supply wire—we help build legacies.
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