Phil Kane wrote in
:

There was a study made of commercial tower failures several decades
ago that showed this, and I've seen this first hand in some of the
broadcast and comm towers affected by the 1989 Loma Prieta earthquake
in the San Francisco area.

Whether the local building official is sharp enough to know this is an
exercise left to the applicant....!

The most likely failure scenarios are very true, but there is a
credibility issue in these matters. We can speak of failure modes until we
are blue in the face, but a simple worst case fall radius is easy for non-
engineering types to understand.

- 73 de Mike KB3EIA -