In a message dated 4/23/2007 9:03:02 A.M. Pacific Daylight Time,
towertalk-request@contesting.com writes:
> I am in the process of erecting a few towers at the new QTH and have a guy
wire size question. Two of the towers will be Rohn 45 @ 100' and the third
will be Rohn 25 @ 100'. They will all have multiple yagis at various
heights on them, so not just a top mounted antenna. The Rohn book indicates
that each tower should be guyed at three elevations and the bottom two guys
should be 3/16" EHS.
> QUESTION: I have LOTS of 1/4" EHS and guy grips. Is the 3/16" mandatory
to
meet the specs (as in the 1/4" is too heavy) or - is the 3/16" simply
suggested (as in the 1/4" is not necessary but acceptable)?
While the LXC Prime Directive to "DO what the manufacturer says" still
applies, what you're proposing is a little bit of over-engineering (which is
not discouraged, BTW).
The capacity of any tower is a function of its leg strength. By using
bigger guys you'll be putting more compression on the legs but at the heights
you mentioned, it's not a big deal. 45G will go to 300' and 25G will go to
200' so you're not overstressing anything.
Cheers & GL!
Steve K7LXC
TOWER TECH -
Professional tower services for hams
Cell; 206-890-4188
************************************** See what's free at http://www.aol.com.
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