[TowerTalk] screw anchors (was Welding Rebar)

[Hans Hammarquist]

I don't see any problems with screw anchors. Anyone what havae had any problems with them The one I use are, according to the manufacturer's spec., good for a pulll force of 14,400 # in undisturbed,dry sand.


Hans - N2JFS



-----Original Message-----
From: Wayne Kline <w3ea at hotmail.com>
To: Roger (K8RI) on TT <k8ri-on-towertalk at tm.net>; towertalk <towertalk at contesting.com>
Sent: Mon, Jan 6, 2014 1:51 pm
Subject: Re: [TowerTalk] Fwd:  Welding Rebar


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 at tm.net
> To: towertalk at 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
> >
> >
> 
> 
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