[TowerTalk] Fwd: HDBX-48 figures for 90 mph zone

[HansLG at aol.com]

In a message dated 12/6/2011 4:43:51 P.M. Eastern Standard Time,  
w2lu at rochester.rr.com writes:

As I  recall wind pressure "on a flat surface" at 70 mph is 20.6 lbs/sq 
ft., 
so  if the  tower is rated for
18 sq ft at 70 mph, would it be too much of  a stretch to say to the zoning 
board that since wind pressure at 90 mph is  34 lbs/sq ft, by simple math, 
the tower should be good for 10.9 sq ft at  90 mph ?
Gene / W2LU






Nop! It is not that easy. You have to take the wind surface of the  tower 
into the calculation as well which makes it "a little more  complicated".
 
Hans - N2JFS