[TowerTalk] wind loading

[hanslg at aol.com]

 Standard formula is F9(in lb)=V(in mph)*V(in mph)/390   F=V^2/390

73 de Hans - N2JFS

 


 

 

-----Original Message-----
From: Gregg Seidl <k9kl at centurytel.net>
To: Tower and HF antenna construction topics. <towertalk at contesting.com>
Sent: Sun, May 2, 2010 10:29 am
Subject: [TowerTalk] wind loading


ND9Z and myself are trying to calculate what size tubing I need for my 
planned 4*6M-5XG array. What I'd like to know is this:how many pounds of 
force does the wind exert on each square foot of antenna load at 80MPH. Is 
there an online guide to that? Just trying to figure if a 4.5 inch with a 
.250 wall thickness is in the ballpark for 80 MPH. This would be the 
croosboom. I'm planning 2 inch by .187 wall for the vertical peices. This 
would be a 20 foot by 20 foot H frame. The antennas have a 2.7 sq ft rating 
each.

  Gregg  K9KL 


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