TT:
There are lots of other examples and case studies of uber-lightning and
grounding installations linked from the main page of that site:
https://www.copper.org/ . Click the Applications tab, then, under
Electrical, click Power Quality. You also can find a series of articles on
the (copper) Statue of Liberty under Education. Fascinating site.
73 de
Gene Smar AD3F
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Shawn
Donley
Sent: Wednesday, June 28, 2017 9:05 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Lightning
Here's one documented case of lightning damage to concrete. I had posted it
before but here's a repeat.
https://www.copper.org/applications/electrical/pq/casestudy/a6137/a6137.html
In this case a concrete guy anchor was damaged. But looking at the pictures,
this might have been caused by moisture entry due to surface cracking with
the lightning strike just finishing it off as the current pulse turned the
moisture into steam. Hard to say. I think the real question is if a
lightning strike can cause internal damage to a tower concrete foundation
that you can not easily detect.
N3AE
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