I want to remember a document generated from investigations of tower failures.
There were a lot of statistics and drawins showing the possible drop zones
after tower failures. I would say it were mostly brodcasting towers that had
been investigated.
It was pretty clear that there were zones around the towers with higher chanse
of falling debries but, if I remember it right, no debries fell as far aout as
the tower height.
Is there anyone with better knowledge of this report and where to find it?
There must be a referrence in the towertalk archive somewhere.
Hans - N2JFS
-----Original Message-----
From: Richard Solomon <dickw1ksz@gmail.com>
To: towertalk <TowerTalk@contesting.com>
Sent: Mon, Jul 8, 2019 2:30 pm
Subject: Re: [TowerTalk] Fall Zone
A tower may be a thing of beauty in
your eyes, but look at it from the
perspective of the guy next door.
I was invited to a co-workers house
for a 4th of July BBQ. This was a
typical suburb setting, houses on a
10K Sq Ft lot. Two doors down the
street were two towers, 100' and 80'.
They were loaded with antennas. Just
imagine yourself in this guys shoes,
looking up at that mass of steel and
Aluminum towering over everything.
And, yes, both towers had proper permits.
Being Law, common sense or common
decency, the rule of falling on your
property is, IMHO, a good rule and
should be followed.
73, Dick, W1KSZ
On Mon, Jul 8, 2019 at 11:11 AM Ron Baran <ronbaran@hotmail.com> wrote:
> I think of a crank up tower with a DB18 atop as a work of kinetic art. I
> can understand that others may not appreciate it but I'm hoping that no
> takes a saws-all to the base. The maim issue with all towers is their
> safety. I've seen lots of towers that were under guyed, over loaded with
> antennas and poorly maintained. A municipality has every obligation to
> insist that a tower conform to wind loading requirements of all other
> structures in the jurisdiction.
>
> When you dropped the 200 foot guyed tower by severing one set of guys you
> turned it into a free standing tower with a large amount of force pulling
> it over. Free standing towers, especially monopole towers, tend to fail at
> the base. Way too much pressure on what is usually a set of bolts.
>
> I'm kind of interested in any engineering research into tower failures.
>
> I've seen photos of an earlier version of my tower that, indeed, failed
> between sections two and three of a four section tower. Severely
> overloaded when a squall showed up unannounced.
>
> Thanks for your comments Wilson.
>
> 73,
>
> Ron
> W9XS
>
>
> ________________________________
> From: TowerTalk <towertalk-bounces@contesting.com> on behalf of Wilson
> Lamb <infomet@embarqmail.com>
> Sent: Monday, July 8, 2019 10:20 AM
> To: undefined
> Subject: [TowerTalk] Fall Zone
>
> I wouldn't want a neighbor's tower/Yagi looming over my backyard...and I
> love towers!
> The fall zone idea seems like simple good manners.
> I have been loosely involved in dropping 200' BC towers, dropped by
> cutting the rods at one guy anchor, thus losing all guys on that side.
> They fell absolutely full length, with a few sections not even bent!
> I think a foundation failure (soil, bolt, gin pole) would drop a crankup
> to full length.
> Is there any experience available on this?
> WL
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