Okay, I'll bite. What if I am intending to install a AB-577 mast sans the
included guys and I want to use 4000i Phyllistran for the top 2 sets of
guys. Is this over kill?
73,
Jim N9WW
James Chaggaris
President
PowerOne Corp./PowerOne Environmental
1020 Cedar Avenue
Suite 203
St. Charles, IL 60174
Phn: (630) 443-6500
Fax: (630) 443-6505
Website: www.pwrone.com
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of jimlux
Sent: Monday, August 31, 2009 9:54 PM
To: K7LXC@aol.com
Cc: Cqtestk4xs@aol.com; towertalk@contesting.com
Subject: Re: [TowerTalk] Philly installation
K7LXC@aol.com wrote:
>
> In a message dated 8/31/2009 6:00:48 P.M. Pacific Daylight Time,
> towertalk-request@contesting.com writes:
>
>> Nothing says you have to tension the cable to a particular fraction of
> it's breaking strength. It's more a matter of the desired tension for
> appropriate stability for the structure. You could tension million
> pound breaking strength cable to the same few hundred pounds as the the
> regular non-EHS cable.
>
> Are you saying that there is no particular tension specification for
a
> guy cable? Please clarify. Since you're an experienced tower owner, I'd
be
> shocked if your tower guys were tensioned at some random tension.
Not at all.. just that the tension spec is derived from the expected
loads, not the breaking strength of what you're tensioning. Obviously,
there's not much to be gained by using a very low strength member
(because you want the static tension to be a small fraction of the
dynamic loads..)
But, if you have a given tower, with given loads, the expected loads on
the guys would be independent of what the guys happen to be made of or
how strong they are.
There are some second order effects because stronger materials tend to
have higher stiffness, but I suspect that's not a big deal.
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