[TowerTalk] Tower Base Round or Square?

[K7LXC at aol.com]

In a message dated 10/26/2011 12:01:09 P.M. Pacific Daylight Time,  
towertalk-request at contesting.com writes:

>  I'm finally getting some dirt work done in the next day  or two at my 
new 
place which will include holes/concrete for my 45g  tower.

>  I plan on using a pier pin install, so does it matter  if the base is 
square or round?  The rohn book calls for a 2' 6"  square hole 4' deep  
(I'm designing the tower based on 90mhp winds  with a height of 120').  
It would be easier to use a 36" auger to dig  the hole.  Since I'm going 
with a pier pin I don't see that there  would be any twisting moments on 
the concrete base, it would only be there  to hold the tower up.  But I'm 
not an engineer, hence the  question.


    You are correct, sir! I'm not an engineer either  but I'll bet if your 
round hole held the same amount of concrete, you'd be  good to go. That yard 
weighs about 4000 pounds so it still ain't going nowhere  anyway.
 
Cheers,
Steve    K7LXC
TOWER TECH