[TowerTalk] FW: Basic tower installation question

[Tommy]

Subject: RE: [TowerTalk] Basic tower installation question

Jim,

Thanks for your comment. However a 70' Rohn 45G 90 MPH BWS (no ice) is rated
for 15.2 sq. ft. But Note 3 of the specs says that figure includes 8 sq. ft.
that was added in for 3 side-arms, which I will not have. So 15.2 plus the 8
sq ft gives this tower a 90 MPH BWS load rating of 23.2 sq. ft., which does
not exceed my total wind load of 6.8 + 12.6 + 2.2 (mast) = 21.6 sq. ft. 

So I don't understand why you conclude I am overloading the tower in my 80
MPH BWS area?

Maybe I have missed something? If so, please let me know.

Thanks.

Tom - W4BQF


-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Jim Hoge
Sent: Tuesday, November 10, 2009 1:19 PM
To: towertalk
Subject: Re: [TowerTalk] Basic tower installation question

You're overloaded, even for 70mph winds. There will be considerable torque
exerted on the tower so consider a star bracket at the top guy point and a
pier pin base if you want to go ahead and exceed manufacturer's specs.
 
Jim W5QM

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