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[TowerTalk] 70-ft Debris Radius?

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Subject: [TowerTalk] 70-ft Debris Radius?
From: (Scott Bullock)
Date: Fri, 4 Apr 1997 05:08:31 -0500 (EST)
Esteemed fellow Towertalkians,
I too was told this by my local building inspector-he wants the tower in the
middle of the lot, exactly in the best open space in my backyard-does anyone
have any paper documentation regarding how towers DO fall?? 
I have seen some talk about this in the past, and you and I know that a
tower almost never falls straight over,but it would be nice to have
something to back this up.
Anything ever been written on this by a PE?? 
In my case, I want to put the tower 22' from the side of my lot (self
supporting crankup).

Would REALLY be nice to have something to give the BI that would maybe
change his mind.

Thanks all,

At 04:34 AM 4/4/97 UT, Joe Spinosa wrote:
>Hi Roger,
>I can tell you that when I applied for a permit to erect a tower in my city, 
>part of the reason they denied it was that they felt that if it ever collapsed 
>it could/would destroy neighboring property.
>In fact, they wanted a huge margin.  If the tower was going to be 50 feet 
>tall, they would want at least 75 feet of clearance in all directions.
>This notion has physically been shown to be false.  I can't remember the exact 
>specification, but its something like 33% of the height of the tower.  In 
>other words, a 50' tower should fail/fall into a circle about 17' in diameter.
>I'm not an engineer, but that's what I'm told.
>I think the numbers are important to show municipalities like mine, because 
>it's one of those aspects of engineering that seems to be counter-intuitive to 
>the lay-person.
>Oh, and by the way, NEVER move to Concord, California if you want to erect a 
>Best Regards,
>Joe Spinosa
>Concord, CA
>FAQ on WWW:     
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