[TowerTalk] Wind area for Rohn tower sections

W7CE w7ce at curtiss.net
Thu Jul 12 22:48:16 EDT 2007


>>
>> Area (square ft/lin ft)
>> Rohn 25 - 0.254
>> Rohn 45 - 0.293
>> Rohn 55 - 0.334
>> Rohn 65 - 0.459
>>

Thanks to all who took the time to answer my question.  I had done rough 
calculations and was using 0.25 sq.ft./lin.ft for 25G and 0.45 for 65G.  I 
figured there must be Rohn numbers to double check my calculations against 
and I'm glad to learn that my estimates are very close to the values derived 
from the older Rohn data sheets.  I'm an Engineer, but haven't done these 
type of calculations since college.  I can continue doing my tower analysis 
with more confidence now.  I tend to design things very conservatively, so 
I've decided to go with 110' of Rohn 65G.  None of the catalog designs work 
at my location, so I want to be sure that the design has plenty of safety 
margin.  Thanks again for the help.

73,
Clay  W7CE



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