the answer is a definate maybe... with a caveat to 'do what the manufacturer
says'.
The problem is that as you move the guy point farther out you increase the
length of the guys which also increases their weight, and the amount of sag for
a given tension, which may actually increase the movement of the tower. the
manufacturer has probably done that tradeoff study already and decided that 80%
was a good compromise between forces, length, weight, wind, cost, etc, etc, etc.
Sep 21, 2011 09:33:55 AM, kb4eq@hetzel.org wrote:
If I have a tower of a specific fixed height that I will be erecting,
and I have plenty of room to do so, I would estimate that I should
gain *some* additional strength against wind-load by moving the
guy radius from 80% of height to 100% of height, since this will
move the guy angle closer to horizontal and reduce the down
force on the tower and increase the horizontal back-force for
a given guy tension and a given stretch in a guy due to motion
of the tower.
Can anyone comment from either a practical experience or
engineering point of view whether this estimate is sound?
73,
Dorn Hetzel
KB4EQ
kb4eq@hetzel.org
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