[TowerTalk] tower foundation concrete

[James White]

dunno if I would be so concerned about this!  Is it better - yes...

as far as the vibrator for your intended purpose of the pour it is not
worthy of the expense...as the concrete fills the hole just poke around in
the hole making sure it flows to all areas of the hole so no air pockets
form...not a problem unless you are pumping the concrete in at a very fast
rate....

As far as upgrading to higher psi concrete...I do not feel the type of
forces present at the base of the tower truly justify the upcharge!  I am
NOT a structural engineer but have sold my share of concrete
chemicals...tower bases are NOT high rise buildings!

73,

Jim, K4OJ

West
Central
Florida





----- Original Message -----
From: "WA2BPE" <wa2bpe@exotrope.net>
To: "Al Williams" <alwilliams@olywa.net>
Cc: <towertalk@contesting.com>
Sent: Wednesday, October 25, 2000 8:50 PM
Subject: Re: [TowerTalk] tower foundation concrete


> It's use is preferable to avoid voids/air pockets in the concrete.  You
can
> "get around" it by not pouring too fast and carefully working the cement
into
> all the corners/sides of the form, etc.  BTW, specify "4500#" concrete; it
will
> be a bit stiffer and the supplier may look at you cross-eyed, but will be
> considerably stronger without spalling and at a minimally higher cost -
> basically the $$ for more Portland cement - a no-brainer one-time
investment.
>
> Good luck & 73,
>
> Tom - WA2BPE
>
> Al Williams wrote:
>
> > Is it necessary (desirable) to use a vibrator when pouring the concrete
for
> > a tower?
> >
> > The tower hole is about 8' deep and 4' square.
> >
> > k7puc
> >
> > --
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>


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