[Top] [All Lists]

[Towertalk] Rebar Cage

To: <>
Subject: [Towertalk] Rebar Cage
From: (Jerry Plemmons)
Date: Fri, 20 Sep 2002 09:55:52 -0400
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-----
[]On Behalf Of Pete Smith
Sent: Friday, September 20, 2002 9:24 AM
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
>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

Self Supporting Towers, Wireless Weather Stations, see web site:
Call 888-333-9041 to place your order, mention you saw this ad and take an
additional 5 percent off
any weather station price.
Towertalk mailing list

<Prev in Thread] Current Thread [Next in Thread>