Rohn FR45G 45G Flat Roof Base Plate

Flat Roof Mounting Solution for ROHN 45G Tower Installations

The ROHN FR45G is a flat roof base plate specifically designed to anchor the ROHN 45G tower series to reinforced, water-tight flat roof surfaces. This mounting solution is ideal for rooftop tower installations where ground-level anchoring isn’t available. It enables the secure setup of a guyed ROHN 45G tower, ensuring structural integrity in demanding rooftop environments. This base is not intended for self-supporting use and must be guyed or bracketed.

Designed for Secure Flat Roof Tower Mounting

Engineered to bolt directly to flat, reinforced rooftops, the FR45G supports guyed configurations only. Installers must ensure the roof surface is water-sealed and structurally prepared to handle tower and antenna weight. Whether for commercial broadcasting, telecom networks, or amateur radio operations, this base provides a strong starting point for your tower project—without the need for a ground-based foundation.

Double-Bolt Connections for Strength and Reliability

The FR45G uses a double-bolt leg attachment system that directly mates with standard ROHN 45G tower sections. This double-bolt configuration is widely regarded as the most dependable method of joining tower sections, minimizing movement under wind load and enhancing overall tower rigidity. It is especially useful in environments where stability is critical and safety standards are high.

Essential Support for Guyed Tower Systems

This base plate is part of a guy-required system and must be supported with guy wires or wall brackets. During both installation and dismantling, temporary steel guying may be needed to ensure the structure remains safe and stable. The FR45G is not a self-supporting base and should never be used without additional stabilization. Proper guying is essential to prevent tower failure.

Roof-Mounted Tower Height Restrictions to Consider

When using the FR45G for rooftop installations, keep in mind that guy line angles and rooftop layout will limit maximum tower height. Guy anchors must be positioned with enough horizontal distance to achieve proper support. These limitations should be factored into your installation planning to avoid compromising the structure’s stability or functionality.

Fully Compatible with ROHN 45G Tower Sections

This base plate is made to fit seamlessly with the ROHN 45G series, one of the most widely used modular tower systems in the industry. With consistent sizing and double-bolt leg connectors, the FR45G streamlines installation while ensuring long-term dependability. It’s a reliable solution for rooftop tower applications involving antennas, microwave links, wireless infrastructure, or weather equipment.

Built for Broadcast, Telecom, and Industrial Use Cases

Whether you're installing a communications tower on a commercial building or setting up rooftop radio antennas in an urban environment, the FR45G provides a strong and proven foundation. It meets the needs of professionals in wireless communications, emergency response systems, broadcasting, and more—where reliability and structural compatibility are critical.