15.24mm Galvanized Prestressed Steel Strand – High-Strength, Corrosion-Resistant Solution for Modern Infrastructure
Engineered for demanding structural applications, the 15.24mm galvanized prestressed steel strand is a premium composite material widely adopted in global civil engineering projects. Comprising seven high-tensile steel wires twisted into a stable spiral configuration, this product delivers exceptional load-bearing capacity while resisting environmental degradation. Manufactured using 82B high-carbon steel and hot-dip galvanizing technology, it meets international standards such as GB/T 5224 and ASTM A416, ensuring consistent performance across bridges, buildings, energy facilities, and marine structures.
Key features include a nominal diameter of 15.24mm (±0.2mm tolerance), cross-sectional area of approximately 140 mm², tensile strength ≥1860 MPa, and stress relaxation ≤2.5% after 1000 hours at 70% of nominal strength. The zinc coating—minimum thickness of 85μm per ISO 1461—provides electrochemical protection against moisture, salt spray, and industrial pollutants. With an elastic modulus ranging from 1.95 to 2.05 × 10⁵ MPa, it ensures predictable deformation under sustained loads, making it ideal for long-span beams, anchor cables, and seismic-resistant systems.
The production process involves precision cold drawing, low-temperature tempering, and controlled twisting on specialized stranding machines. Post-treatment includes constant-temperature tensioning to minimize creep and enhance durability. This meticulous approach results in a material that not only performs reliably under extreme conditions but also supports sustainable construction by reducing concrete usage by up to 50% compared to conventional reinforcement methods.
This versatile steel strand finds extensive use in highway and railway bridges, high-rise buildings with unbonded floor slabs, dam reinforcement, offshore wind turbine foundations, and deep foundation pit support systems. In coastal regions or areas exposed to chemical exposure, combining galvanization with epoxy coating significantly extends service life beyond five decades. It is particularly effective in ballastless track systems, sewage treatment tanks, and large-span roof trusses where crack control and structural integrity are paramount.
Users consistently praise its reliability during installation, ease of cutting to custom lengths, and compatibility with various anchoring solutions like clip-type grips. Engineers highlight how its uniform elongation characteristics simplify tensioning procedures and reduce the risk of uneven loading. Contractors appreciate the reduced need for maintenance due to robust corrosion resistance, especially when deployed in humid climates or aggressive environments.
Common inquiries often focus on proper handling—such as storing suspended to prevent moisture contact—and post-tensioning sealing practices to protect exposed anchor points. Another frequent concern involves compliance with local codes regarding maximum allowable stress levels (typically 60–75% of ultimate strength) and the importance of dual verification through both force measurement and elongation control. For cold-climate applications, confirming low-temperature toughness remains essential for preventing brittle failure.
Contact Now
