[TowerTalk] Above Ground Foundation

[Mike]

This is what I said in an earlier post, the concrete could have been poured
in the usual way, in fact because of the high water table and the amount of
water it would have slowed the curing process and would have made the
concrete stronger over time.

I installed a base at least 2 feet below the winter water table in the past
with no problems, in fact in wet years where I am at the moment my base is
probably below the water table at times.

Mike

-----Original Message-----


Rudy:
Your tower foundation is sitting atop an unstable base. One and a half feet
below ground is certainly not above the frost line so you have a "floating"
foundation which may or may not move. If I have calculated it properly, you
have 18.5 cu yards of concrete in your base. That is pretty darn heavy and
it may well be stable enough. Depends on the windload you will have at the
top. I recommend that you get some professional engineering calculations
done on your installation.
 
By the way, concrete foundations are poured in water all the time. So you
could have had a normal hole dug, pumped out the water, and filled the hole
quickly with concrete.
 
73, Dennis W0JX/8


      
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