Lightning Protection Classes Explained: Mesh Sizes & Protection Angles for High-Rise Structures

<p>Lightning strikes carry immense currents ranging from 30kA to over 100kA. Without an engineered lightning protection system, this energy forces its way through building concrete, steel rebar, and sensitive electrical wiring, creating catastrophic fires.</p> <h3>Mesh Method Sizing:</h3> <ul> <li><strong>Class I (Critical Facilities, Explosive Stores):</strong> 5m x 5m mesh size</li> <li><strong>Class II (High-Rise Commercial & Hospitals):</strong> 10m x 10m mesh size</li> <li><strong>Class III (Industrial Warehouses):</strong> 15m x 15m mesh size</li> <li><strong>Class IV (Residential & Standard Warehouses):</strong> 20m x 20m mesh size</li> </ul>