In a message dated 10/26/2011 12:01:09 P.M. Pacific Daylight Time,
> I'm finally getting some dirt work done in the next day or two at my
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.
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