I think we all have a few OMG or WTF regarding tower/antenna installation
and upkeep
Field Day. are a prime example of Elmer's rule ( If it did not fall down it
was not big enough or high enough )
I personally know of a statin that had 5 towers 4 100' & 1 80' guyed with 3/16
ehs three levels on the 100' and two levels on the 80
all with mono band beams one being a full size 40 meter beam and there were
screw in anchor's and NO I repeat NO concrete
anywhere . the bases being Rohn 25 hinge plates bolted to 2' X 3' steel
plate and a three or four rebar's 1/2 dia pounded in the soft wet ground.. last
for many many many years
YMMV
Wayne W3EA
Date: Mon, 6 Jan 2014 03:26:43 -0500
> From: K8RI-on-TowerTalk@tm.net
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Fwd: Welding Rebar
>
> On 1/6/2014 12:58 AM, Hans Hammarquist wrote:
> > I believe K2TTT put one tower up using nothing as a base, just the tower
> > standing on a small plate, resting directly on ground. Yes, it is (was)
> > guyed.
> Over the years (since 61) I've had 7 towers up using dirt bases. They
> were only 40-50' with one 60 footer, and one 90 footer, all guyed. I
> had a 5L 20M KLM, 6L 15M KLM,(42' booms) and a 7L Wilson 10M Yagi on a
> 39' boom. One was 90' with a Cushcraft ATB34 It's a rather rugged dirt
> base and in solid soil, I'd not hesitate to go 90 feet with 25G, but
> avoid those towers that only have the horizontal bracing.
> http://www.rogerhalstead.com/ham_files/Dirt_Base.htm I'd consult an
> engineer for higher or different soil. I over guyed the 90 footer which
> was a mistake. The extra weight and proper tension of the larger steel
> guys put an excessive vertical load on the tower causing the bottom 3
> sections to bell out where they join, requiring a hydraulic jack to get
> them apart.
>
> 73
>
> Roger (K8RI)
>
> >
> > Dave, am I correct?
> >
> >
> > Hans - N2JFS
> >
> >
>
>
> ---
> This email is free from viruses and malware because avast! Antivirus
> protection is active.
> http://www.avast.com
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|