George:
That is pretty close to how it is. For everything but columns,elevated beams,
and shear walls we spec stripping is ok after 7 days, for the execptions we use
14 days.
73
Hank Lonberg, P.E.,S.E. / KR7X
Lonberg Design Group, Ltd.
> 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
>
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather
> Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
> and ask for Sherman, W2FLA.
>
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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