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[TowerTalk] elevated guy posts

To: TOWERTALK@contesting.com
Subject: [TowerTalk] elevated guy posts
From: SGTOKIE@aol.com
Date: Wed, 3 Mar 2004 18:16:57 EST
List-post: <mailto:towertalk@contesting.com>
I used elevated guy posts because of area problems as well.  my tower 
installation is on a rohn 25g at a total height of 60 ft.? i use 3 sets of guys 
@ 20' 
40' and the top at 60'......i know that is overly cautious but i was unable 
to spread guys to 60% of the height....my antennas are:

cushcraft 13b3????????    1.8sq/ft??????? ?????? 68'?? 
cushcraft 6176b???????   4.8sq/ft??????? ?????? 60'
cushcraft 719b????????    1.2sq/ft??????? ?????? 65'
2-2m big wheel??????????? 1.0sq/ft (apx)??????55'
2-6m loop?????? ??????      1.0sq/ft (apx)?????? 55'???????? 
2-70cm loops??????????    0.4sq/ft (apx)???????55'
10m sloping dipole??????0.2sq/ft (est)?????? ?50' 
40-20-15-10m dipole????0.5sq/ft (est) ?????? 50'???????? 
80m inverted vee?????????0.8sq/ft (est)????????55'???????? 
discone scanner ant????0.5sq/ft (est)????? ??45'
???????????? ?????? ?????       12.2sq/ft apx

1-7/8" hardline
2-1/2" hardline??? 
3-RG-213???? 
1-RG-8X
1-remote coax switch @55'
my 235lb fat butt (sometimes)

Rohn gives 10.2sq/ft at the 60' level with 2 sets of guys at 55' and 28' 
levels and allows 1 5/8" feed line on each leg for 90mph wind velocity and no 
ice.

if i assume the maximum, then i have exceeded the design, however, i expect 
the dipoles to fail with 1/2" ice and therefore reduce the total top load to 
10.7sq/ft.? still puts me 0.5sq/ft over the allowable max top antenna load but 
there is? 2.4sq/ft at the 55' level and 0.5sq/ft at the 45' level......I am 
pretty sure i am in the ball park area of having a safe tower installation.

de kd5qwo, david howard
_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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