[TowerTalk] Using old concrete in new pour

[Paul Braiman]

I just finished erecting a Tashjian LM 354HD. Spec for the concrete base was 3.5' x 3.5' by 7' deep. I ended up with 4' x 4' x 8’. I sleep slightly better at night. :)


On Oct 22, 2014, at 11:42 AM, Ken <wa8jxm at gmail.com> wrote:

> 
> On Oct 22, 2014, at 10:39 AM, David Gallatin via TowerTalk wrote:
> 
>>  I have a pour scheduled for Monday. $233 for 1.5 yds direct into my hole, which I go now to dig. My back hurts already. :)  73,
> 
> 
> Yikes, I hope you aren't digging it by hand!   Better hurry up and hope you don't hit rock!  
> 
> (I have a rock layer here at 40" down.)
> 
> 
> As for your original question, I find it amazing how requirements have changed since I got my license (1963).   Look around at all the towers standing for 30 years and I'll bet they don't have high strength concrete and complex rebar.   They just won't last....   ;-)     Seriously, I put up a 64' freestanding Heights tower twice in 1970 and 1975 and hand mixed the concrete (two days on the first one using Sackrete) and it only needed a 4x4x4 base back then with a TA-33 tribander and other antennas on it.   
> 
> I do think the lawyers have changed the engineering specs over the years.
> 
> Good luck digging,
> 
> Ken WA8JXM
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