Re: [TowerTalk] Concrete Base?

[Tom Anderson <WW5L@gte.net>]

Ted:

When I put in the 4x4x6 base  for my freestanding WT51 TriEX crankup 12 
years ago I let the base cure a month and periodically sprinkled it with 
water to keep it from drying out too fast (since I put it up in the 
middle of a hot Texas summer) and developing cracks.  Previously when I 
put up 40 ft of Rohn 25 at another QTH I let the base (3x3x3) dry a 
couple weeks since the 40 ft. tower would be bracketed to my house. 
Either way I sprinkled the concrete a couple times a day just to keep it 
from drying out too fast.  With the Rohn I also attached the first 10 
ft. section the the 3 foot base and roped it off to the fence and patio 
so it would remain plumb throughout the drying process.  Also with the 
Rohn I put in a layer of river rock gravel at the bottom of the hole so 
the tower could drain any condensation into the ground and not collect 
inside the tower legs and cause corrosion.

Tom, WW5L



k2qmf@juno.com wrote:
> Hello All,
>
> I have a question regarding tower base concrete.
>
> How long should concrete cure after pouring to
> be safe to install a crank-up, tilt over tower???
> The mix is 3500 psi.
>
> Many Thanks in advance.  73,  Ted  K2QMF
>   
>
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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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