[TowerTalk] One anchor Hole is not deep enough to Specs (3 feet versus 6 feet deep)

[Wes]

If you can't break up the shale and remove it then why not use it as the 
anchor?  Bore some holes in it, epoxy in some rebar and cast that in concrete or 
epoxy in some anchor bolts and bolt in the guy anchor extension.

Wes  N7WS


On 2/17/2022 3:49 PM, Steve Lott wrote:
> My plan is now a Rotating Tower
> using the K0XG tower Hardware
>
> Tower is Rohn 45G
> 140 feet Tall
>
> It will have a KT34XA at 142 feet (short Mast)
>
> A Fifteen meter Stack of Three 5 element beams at heights of
> 52, 82 and 112 feet
>
> The Rohn Specs show Guy anchors at 112 feet from the base of the tower
> However, it was recommended by Richard of K0XG rotating Tower Equipment to
> push those guy anchor points out much longer
> So, I have chosen 165 feet as the distance to the Guy anchors, Richard say
> this will afford me very good guy clearance on my antennas
> and an Excel spreadsheet program written by Hal Kennedy N4GG confirms this.
>
> Here is the kicker.............
>
> Once again I have hit Shale Rock in one of my Guy anchor holes
> and was only able to get to 3 feet zero inches deep versus the specified 6
> feet deep for the anchor holes
>
> I had this issue before with my North Guy anchor on my first tower
> at that time I was only 2 feet deep
> Back then used the Rotating Hammer drill and the expanding paste and gained
> another 6 inches after 6 weeks of work
>
> The solution then was instead of a 1 foot 6 inch pad of concrete in that
> hole and then back fill the dirt on top of it, I filled the hole to surface
> level with concrete
> and have had zero issues, with a very heavy loaded on a Rohn 55G tower
> Those guy anchors are 130 feet per specs on the distance.
>
> My question is with the Guy anchors further out (distance) than spec
> can I get away with filling the less than spec deep hole once again with
> concrete
> (versus a 1.5 foot thick pad in the 6 foot deep hole back filled with dirt,
> a three foot deep 6x3 by 3 deep, filled to the ground level with concrete)
>
> Someone stated that further out guy distance from the base of the tower
> will actually place much more stress on my guy anchors and therefore my
> once again plan
> may not be viable.
>
> Everyone's thoughts would be appreciated
>
> Steve
> *KG5VK*
> Tele 318-470-9806
> ARRL NTX Section Manager
> *Please note: My Out Going Email address is LottsPhoto at Gmail.com*
> *KG5VK at ARRL.ORG <KG5VK at ARRL.ORG> is forwarded to my Gmail address*
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk