73 de Al, KE1FO
Check out my Amateur Radio Contesting blog at ke1fo.wordpress.com.
On Thu, Apr 22, 2010 at 9:45 PM, Michael Tope <W4EF@dellroy.com> wrote:
> I forwarded a copy of Hector's email to the tower owner along with a
> copy of the Rohn hardware page that has their shackles and a note
> suggesting that he change out that improper hardware (I also recommended
> that he subscribe to TowerTalk).
> 73, Mike W4EF/6
> On 4/22/2010 6:31 PM, Steve Maki wrote:
> > Roger (K8RI) wrote:
> >>> Think of them as mechanical fuses ;)
> >> They certainly are the weakest link in the system. OTOH maybe I
> >> shouldn't say that without seeing the other ends of the guys.<:-)) I
> >> guess I'm a bit puzzled as to why put those rings in there in the first
> >> place. The links above them are probably about 1200# which is still way
> >> under even 3/16" EHS. It looks like he's using the 6000# test
> >> Phillystran...with 1200# links?
> > Well, once they decided to use the screw chain links, they needed
> > something that would fit into them, which the thimbles would not do.
> > This part of the install was not planned very well, but the rings, which
> > appear to be 1/4", are a little better than key rings.
> > Next time they will undoubtedly will use a shackle right there...
> > -Steve K8LX
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