[TowerTalk] Concrete strength

[Alan NV8A]

On 10/27/10 11:39 pm, Ed K0KL wrote:

> Concrete used for beams and columns and other standalone structures
> in a building or bridge need time to develop in order to perform the
> intended
> assignment. I am assuming in all discussed cases the concrete has iron in
> it (rebars)
>
> For the most part the 21 yards of concrete under my tower provides
> dead weight, aided by the soil around it to keep the tower straight.
> (Think overturn moment) or anchoring a guy wire.

21 yards!!! My goodness! What kind of tower do you have that needs 21 
yards of concrete? My UST HDX-555 needed only 5.5 yards, but the hole 
got dug too large and took 9 yards; I'm glad it was a fixed-price quote.

73

Alan NV8A