How Is a Radar Tower Designed for Wind Load?
Quick Answer A radar tower is designed for wind load through a rigorous, physics-based process that treats the structure as a precision instrument under lateral assault . The design begins by calculating the Effective Projected Area (EPA) of everything the wind “sees”—the open lattice frame, the radar pedestal, and most critically, the large radome, which acts as a sail. This area is multiplied by the site-specific design wind pressure (often specified as a 3-second gust of 250 km/h or higher for critical installations) to determine the total overturning force. Because even a fraction of a degree of deflection can corrupt radar data, the tower is then engineered for exceptional stiffness, with strict deflection limits (e.g., 0.1° at design wind speed) and a natural frequency tuned to avoid resonance with wind or the rotating antenna. Key Takeaways · The Radome is the Dominant Wind Sail: The large protective dome (often 8–15 m in diameter) presents a massive, solid surface to the win...