On 4/9/02 9:29 AM, Dan Evans at n9rla@yahoo.com wrote:
>The annoying part of that is, every tree I've ever seen fall, fell it's full
>height. But no one is restricting the height of trees.
Actually, when a tornado went through my neighborhood in 1988, the fallen
trees almost never fell their full height.
Instead, they were snapped off at about 12-18 feet off the ground.
The one incident of a tree falling out to its full height was a
neighbor's tree that leaned over to one side after many, many days of
rain waterlogged the ground, and caused the roots to pull out. That one
failed about 2-3 feet BELOW the ground.
I don't think below ground failures are likely for proper tower
installations. Failures 10-20 feet off the ground are more likely. Towers
(and trees!) are awfully strong right next to the ground.
Bill Coleman, AA4LR, PP-ASEL Mail: aa4lr@arrl.net
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
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