Which of the following is considered an appurtenance on a guyed tower?

An appurtenance refers to an accessory or supplementary component that adds to the functionality or support of a structure. In the context of a guyed tower, the antenna boom is classified as an appurtenance because it enhances the tower's ability to support communication equipment, specifically antennas, which are vital for the tower's primary purpose of transmitting and receiving signals. By extending the reach of antennas away from the main structure of the tower, the antenna boom contributes significantly to the overall effectiveness of the communication system.

Other components like the base plate, climbing ladder, and grounding wire serve important functions but do not fit the definition of appurtenances in the same way. The base plate is a fundamental part of the tower structure, providing stability and securing it to the ground. The climbing ladder is essential for access and maintenance, while the grounding wire is critical for safety and protecting equipment from electrical surges. While all these components are crucial for the operation and safety of a guyed tower, they do not serve the same role as the antenna boom in enhancing the principal functionality of the tower.