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The limiting part of the Rohn standard installation in heights under a 100'
is the 
guy strength. Keep the guy spacing around 25-30 feet, use the guy brackets 
- no torque arms - and use two top guys per anchor on top to take out the 
torsional loads. If you want 100 feet of Rohn 25 to hold up a TH 11 then put 
1/4 inch guys on it and double the top guy. In ice country use 5/16. 
de n0yvy steve
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