Re: [TowerTalk] RE: Erecting tower

[WD0M <wd0m@centurytel.net>]

Same story that I got from my local concrete guys (and a cousin who is in 
the concrete business).  Must be true!

73,
Joe
WD0M

At 01:34 PM 12/5/2003, gdaught6@stanford.edu wrote:
> On 5 Dec 2003 at 10:50, WD0M wrote:
>
> > I just poured a base for a self-supporting US Towers TX-455 - the
> > local concrete guys said 7 days is sufficient.  I used 4000 psi concrete
>
> My concrete guy (actually retired concrete guy, but doing occasional
> jobs to pick up a few bucks) explained it to me this way, which
> seemed very logical.
>
> You can take the forms off after 24+ hours, because it's set up
> satisfactorily by then.  In about a week, it'll be at about 75%
> strength, so you can do pretty much whatever building you need to do
> after that time.  After a month it's up to full rated strength, and
> although it continues to cure, it changes very little after that.  So
> your 4000 psi concrete is at about 3000 psi after a week.
>
> I hasten to add that I'M NOT the concrete expert, but just repeating
> what I was told.
>
> 73,
>
> George T. Daughters, K6GT


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