Straight line winds once blew over my 95" self-supporting tower. All =
three legs bent a foot above the concrete. It was laid out perfectly =
flat along the ground when I arrived back from vacation!
Fortunately the winds were nearly parallel to the south face of the =
house. With 5 6-element 10M and 15M yagis attached, it was quite a =
mess, but could have been worse.
BTW, the 3/16"-wall chrome-moly mast was only slightly bent from the =
fall and impact. A friend straightened it with a hydraulic press and =
it's currently in use with my log-periodic.
73 ---> Dave, W9ZRX
(zephd@iquest.net)
----------
From: Scott Neader[SMTP:neader@QTH.com]
Sent: 16 October 1996 01:21
To: towertalk@contesting.com
Cc: K7LXC@aol.com
Subject: Falling tower question
>> If I should ever lose a top guy wire or its anchor, should I =
expect
>>to have the tower collapse instead of bending?
> Interesting question. According to the information that I've =
seen, a
>guyed tower will fall typically within a circle around its base =
approximately
>30% of its height. It doesn't "fall over" because it is constrained, =
or
>tethered, by the remaining guy wires. Talk about a pile of scrap...
>
> BTW, this probably shoots the heck out of tower building set-back
>regulations.
So, what happens to a self-supporting tower when it decides to fall? =
Does
it typically stay within that 30% of height... or will my future tower =
hit
my neighbor's house? (just planning my answers when the neighbors =
start
asking once I do choose a tower and put it up)
- Scott KA9FOX
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