[Boatanchors] TOWER ERECTION

[Jim Wiley]

I respectfully disagree. Rohn sells "half sections" of tower 
specifically intended for insertion in wet concrete for use as tower 
bases.  I will take a chance here and say that Rohn's engineers probably 
know what they are doing.

Also, I put up a 110 foot stick of Rohn 65G n 1970, and 35 years later 
it was still sound.  Took it down due to a relocation in 2005.

I buried the first 20 ft  by boring a hole 10 ft deep  by 3 ft diameter, 
and inserting the 20 ft first section into the hole as a base.  The 
remainder of the section stuck out of the hole to 10 ft above grade.  I 
then poured concrete in the hole, using the tower section cross bracing 
as rebar.  It was easy to set the tower plumb by simply dropping a plumb 
line from the top of  the section to ground level.

When the concrete was "set", I assembled 5 sections (100 ft) on the 
ground,  and then put up the rest of the tower in one piece with the aid 
of a local crane operator.   Installed 2 sets of guys, one set at 45 ft 
and the other at 90 ft.

Got pix somewhere.

- Jim,KL7CC



On 6/30/2015 4:33 PM, John via Boatanchors wrote:
>   <snip>
>   
> Burying a tower section for use as a base is not a good idea.  Eventually
> corrosion and chemicals will take their toll.
>   
> 73,
>   
>   John,  W4AWM
>