Copper Air Terminal Class-1

For a Class 1 Lightning Protection System (LPS), copper air terminals (also known as lightning rods or strike termination devices) are designed for structures that do not exceed 75 feet (23 meters) in height. These terminals serve as the primary interception point for lightning strikes, safely directing the current into the down conductor system.

• Diameter: Solid copper rods must have a minimum diameter of 3/8 inch (9.5 mm).
• Height: Standard height typically ranges from 10 to 24 inches (254 mm to 610 mm) above the protected surface.
• Spacing: On roof edges, they are typically spaced every 20 to 25 feet depending on the rod's height.
• Tip Design: While traditionally sharp, modern standards often recommend blunt or rounded tips (up to 1 inch diameter), as research indicates they are better lightning receptors.

• Rolling Sphere Radius: 20 meters (66 feet).
• Mesh Spacing: 5m x 5m.
• Down Conductor Spacing: Every 10 meters.
• Cross-Sectional Area: Solid copper conductors should be a minimum of 50 mm² to prevent overheating during a strike.

• Material: Solid pure copper is the preferred choice due to its high electrical conductivity and excellent corrosion resistance in diverse environments.
• Bases: Terminals are typically mounted using copper air terminal bases which must be securely fixed to the building structure.
• Lifespan: A properly installed copper LPS can last 50+ years with minimal maintenance.

Note: LATEST UPDATE JANUARY 28, 2026. CONTACT US FOR CURRENT PRICES.