When the Catenary weight of 1/4" EHS changes the angle of the torque bar to
destroying the bracket VS resisting twist it all makes sense... Adding
larger shackles compounds the issue.
Likely not an issue with your short tower but worth a call to Rohn.
Ron, WV4P
On Fri, Jun 9, 2023 at 8:21 PM Steve Maki <lists@oakcom.org> wrote:
> That's idiotic, or at least short sighted.
>
> Use the biggest pin shackle that will fit in the torque arm, and 1/4"
> big grips (preforms) with thimble in the shackle. This makes it easy to
> remove a guy wire temporarily whenever needed.
>
> As has been pointed out often, the torque arms don't do much for
> rotational resistance, but if you have them, use them. It makes a nice
> install.
>
> -Steve K8LX
>
> On 2023-06-09 8:34 PM, Mike H wrote:
> > I acquired some used Rohn 45G in very good shape and will be going up
> > 50 ft. Antenna will be stacked 2 x 9-el for 2m. I'm following the Rohn
> > engineering guidance very closely: base is a new R-SB45G buried in the
> > prescribed concrete block along with GAR30 guy anchors, also in
> > concrete. I have the older style guy bracket for 45G that has (very
> > expensive!) TB45D torque bars
> > <
> https://www.3starinc.com/rohn_45g_torque_bars_for_use_with_guy_bracket_r-tb45d.html>
>
> > along with several hundred feet of brand-new 1/4 in EHS for the guys.
> > According to the Rohn instructions, however, I can't use EHS cable
> > that's greater than 3/16 in:
> >
> > https://www.3starinc.com/manuals/ROHN_Torque_Bar.pdf
> >
> > This means I'd have to buy either smaller EHS cable or their newer guy
> > bracket that doesn't use torque bars. I'll do this if I have to, but
> > I'd sure like to understand why 1/4 in EHS is a deal-breaker for the
> > torque bars. QTH is north Florida so I want to make the setup as
> > storm-proof as practical. Any insight appreciated.
> >
> > Mike WB2FKO
> > _______________________________________________
> >
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