Under what circumstances must a tower be reanalyzed?

A tower must be reanalyzed after modifications or load changes because such alterations can significantly impact the structural integrity and stability of the tower. Any changes to the design, the addition of equipment, or adjustments to load-bearing components can affect how the tower handles stress, wind loads, and other environmental factors. Regular reanalysis ensures that the tower continues to meet safety standards and operational requirements following any changes.

While it might seem prudent to conduct regular inspections annually or at other set intervals, the critical factor here is that it is the specific changes to the structure itself that necessitate a reanalysis. This proactive approach helps in identifying any potential safety issues that arise from modifications, ensuring that the tower remains safe for all operational purposes.