Thanks, Pete. Several Towertalk readers responded directly detailing other
occurrences of concrete cracking after a lightning hit. I don't think
anyone in the thread ever used the term "blow up" the concrete. Just that
were is a possibility of the concrete being compromised. I'm certainly not
leading legislation to ban Ufers. I just prefer to avoid them. I guess I'm
sorry I asked the question in the first place.
Jerry, K6JRY
-----Original Message-----
From: towertalk-admin@contesting.com
[mailto:towertalk-admin@contesting.com]On Behalf Of Pete Smith
Sent: Friday, September 20, 2002 9:24 AM
To: towertalk@contesting.com
Subject: Re: [Towertalk] Rebar Cage
At 09:09 AM 9/20/02 -0400, Jerry Plemmons wrote:
>The document recommends Ufer only as an augmentation to a properly designed
>and implemented ground system. And that, yes, a strike, under certain
>circumstances, can cause the foundation to crack. I think that is what was
>said at the beginning of this thread before a plethora of experts took
issue
>with it.
That's awfully selective, Jerry. The article also says, "It is a common
misconception to think that a lightning strike will blow up a concrete pad."
As for the "certain circumstances," they say, "We have only seen this
happen once on a mountain top in the Nevada desert. However, a few poorly
implemented occurrences can give a valuable technique a bad
reputation." In addition. the case they describe involved J-bolts, not a
rebar cage.
What was said at the beginning of this thread was nothing but a restatement
of the common misconception.
73, Pete N4ZR
Sometimes a tower is just a tower
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