[TowerTalk] Complex Guying Question

[Pete Smith]

I have a 97' Rohn 25 tower mounted on a pier pin.  The guys are at 92, 
61, and 31 feet above ground.  The tower has 2 C-3E tribanders at 69 and 
98 feet, and an EF-240 on a 10-foot mast above the top yagi.  We're in a 
pretty benign wind environment.

Now here's the complex part.  I want to re-tension the guys, which were 
originally set a number of years ago at 400 lb all around, and I figured 
as long as I am doing this job, I should do it better, if possible.  
Why?  Because each guy set is made of different material, and I suspect 
that should/might influence the desired pre-set tension.

The top guys are 6700-lb Phillystran down to about 15 feet above ground, 
and 3/16 EHS below that.  I know it's a mismatch, but I got the Philly 
guy sets cheap.

The second set of guys use Joslyn 21-foot fiberglass power-pole 
insulators on the tower end, and 3/16 EHS the rest of the way to the 
ground.  These insulators are only a little heavier than EHS of the same 
length, but pretty stiff, as you might expect.

The third set are 3/16 EHS all the way, insulated at the tower.

My question is this - what, if any, adjustment would you make to the 
400-lb pre-tensioning value for each guy set?

-- 
73, Pete N4ZR

The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com,
spots at telnet.reversebeacon.net, port 7000