I would call that severe overload.
Maybe a C3 up there.
----- Original Message -----
From: <n4kg@juno.com>
To: <TOWERTALK@contesting.com>; <k2av@contesting.com>
Sent: Tuesday, April 09, 2002 11:29 AM
Subject: Re: [Towertalk] Inquiry - Tower Collapse/Fall/Radius Zone
> On Tue, 9 Apr 2002 "Guy Olinger, K2AV" <k2av@contesting.com>
writes:
>
> > One thing I do NOT see often in these collapse discussions, is
> > discussion of the merits of self supporting towers in these tight
> > situations.
> > SNIP
>
> > A self-supporting tower is made of much stronger stuff at the
bottom
> > than at the top, and apparently has a VERY different failure mode.
I
> > have heard only one failure story on a Trylon self-supporter.
(LXC,
> > any tales or stats on self-supporting?)
> >
> SNIP
>
> I saw an 80 ft Heights Aluminum Tower with KT34XA
> laying in the side street 3 weeks after installation.
> One of the tapered legs folded in on the base or
> next to base section. I have never understood
> why Heights does NOT have a horizontal brace
> on the TOP of each section, especially the ones
> which taper in.
>
> Contributing factors included some defective welds
> and probable overloading of the tower based on
> low wind speed ratings. The owner was advised
> against placing such a large antenna on this tower
> but proceeded anyway.
>
> Tom N4KG
>
>
>
>
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