ASTM A572 Grade 50 Double-Circuit 15m High-Voltage Transmission Steel Pole Seismic Resistant IEC 60826
ASTM A572 Grade 50 Double-Circuit 15m Transmission Steel Pole
Product Overview
The ESP-DC-15M-A572 represents our flagship double-circuit transmission pole solution, fabricated from ASTM A572 Grade 50 high-strength low-alloy steel (345 MPa yield). Engineered for 66kV through 132kV transmission networks, this 15-meter dodecagonal pole features a seismic-resistant design per IEC 60826 and supports dual vertical circuit configurations with independent phase spacing.
Key Features
- ASTM A572 Grade 50 Steel: Premium HSLA steel with 345 MPa minimum yield strength, excellent weldability, and superior toughness at low temperatures (-20°C Charpy V-notch certified)
- Double-Circuit Configuration: Factory-engineered arm layout for two independent 3-phase circuits on a single pole structure, halving ROW requirements
- IEC 60826 Seismic Design: Analyzed using response spectrum method for Zone IV seismic loading (PGA 0.24g), with verified modal frequencies above lock-in thresholds
- Dodecagonal Cross-Section: Near-circular aerodynamic profile reduces wind drag coefficient by 15% compared to octagonal equivalents
- VCI Packaging: Volatile Corrosion Inhibitor wrapping protects machined surfaces during ocean freight and extended site storage
Technical Specifications
| Parameter | Value |
| Voltage Range | 66kV / 110kV / 132kV |
| Circuit Type | Double-Circuit Vertical (DCV) |
| Conductor Capacity | Up to ACSR Hawk (477 MCM) per phase |
| Foundation Type | Direct embedment or anchor bolt cage |
| Design Code | ASCE 48-11 / IEC 60826 |
| Service Life | 50+ years (design basis) |
Applications
Designed for high-voltage transmission corridors where right-of-way is constrained, urban transmission line upgrades, substation interconnections, and grid reinforcement projects. The double-circuit configuration is particularly cost-effective for parallel feeder routes serving growing load centers.
Engineering Support
Every ESP-DC order includes complimentary foundation design calculations, PLS-POLE structural analysis report, and site-specific wind/seismic loading verification. Our in-house transmission engineering team provides full project lifecycle support from conceptual design through commissioning.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.