The 15 7mm Unbonded PC Strand is a premium prestressed concrete tendon engineered for high-performance structural applications in modern construction. Designed with precision and durability in mind, this product delivers exceptional tensile strength, corrosion resistance, and flexibility—making it ideal for bridges, high-rise buildings, and large-span infrastructure projects worldwide. As part of Chunpeng Group’s extensive portfolio of Prestressed Steel solutions, the 15 7mm unbonded PC Strand meets international standards such as ASTM A416 and ISO 10138, ensuring reliable performance across diverse environmental conditions.
What sets this unbonded strand apart is its unique design: seven individual high-strength steel wires are arranged in a compact pattern, each cold-drawn and heat-treated to achieve uniform mechanical properties. Unlike bonded tendons, the unbonded configuration allows independent movement between wires, reducing stress concentrations and enhancing load distribution under dynamic or cyclic forces. This feature not only improves structural resilience but also simplifies installation, especially in complex geometries where post-tensioning is required after concrete casting.
Key characteristics include a protective polymer coating that resists rust, moisture, and abrasion while minimizing internal friction—a critical advantage for long-term durability in coastal, industrial, or humid environments. The strand's ability to accommodate thermal expansion and contraction makes it particularly effective in regions with extreme temperature fluctuations. Additionally, its compatibility with various anchorage systems ensures seamless integration into both new builds and retrofitting projects.
Manufactured using advanced wire processing techniques and rigorous quality control, the 15 7mm unbonded PC strand offers consistent performance throughout its service life. It is available in multiple variants including galvanized, weather-resistant, and anti-corrosion versions, catering to specific project needs—from urban transit systems to offshore platforms. Its versatility extends beyond traditional civil engineering; it supports innovative uses in renewable energy infrastructure, such as photovoltaic mounting systems, where structural integrity and longevity are paramount.
Engineered for global use, this prestressed steel tendon has been successfully deployed in thousands of projects across Europe, North America, Australia, and Southeast Asia. Construction professionals appreciate its ease of handling, reduced installation time, and proven reliability under heavy loads and seismic activity. Whether used in precast elements, bridge decks, or foundation slabs, the 15 7mm unbonded PC strand enhances safety, reduces maintenance costs, and contributes to sustainable building practices by extending the lifespan of reinforced concrete structures.
Users often highlight how the strand’s flexibility during installation minimizes damage risks, while its superior corrosion protection translates into lower lifecycle expenses. Many engineers report improved crack control and better overall performance compared to conventional bonded alternatives, especially in structures exposed to aggressive environments like marine or chemical exposure.
Common questions about the 15 7mm unbonded PC strand typically focus on its suitability for post-tensioning applications, expected service life under different climates, and compatibility with standard anchoring equipment. Most inquiries confirm that proper installation following manufacturer guidelines yields optimal results, with minimal need for mid-life intervention. Another frequent topic involves comparing its cost-effectiveness against alternative materials—where its combination of durability, low maintenance, and long-term value consistently ranks highly among industry experts.
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