[TowerTalk] EHS cable and torque bars

[Steve Lott]

Yup
I would use the shackle

Steve
KG5VK

On Sat, Jun 10, 2023 at 7:34 PM Steve Maki <lists at oakcom.org> wrote:

> I was shocked yesterday when I saw the pricing. But any of the Rohn
> torque bars I've seen over the last 50 years are plenty strong enough to
> handle 1/4" EHS, I guarantee.
>
> The 3/16" EHS limit may be something as simple as the hole size in the
> bar. If you look at specs for preforms, 1/4" requires a 1/2" thimble and
> minimum 1" pin. 3/16" only requires a 5/8" pin.
>
> But look, the OP is installing a 50' tower. We tend to go overboard
> sometimes around here.
>
> -Steve K8LX
>
> On 2023-06-10 12:30 PM, john at kk9a.com wrote:
> > $325 each, Rohn is very proud of their torque bars.  In my opinion they
> do
> > little to resist tower twisting.
> > I think you'll have to ask Rohn why there is the 3/16 EHS limit.  I had
> an
> > issue once and Rohn was very responsive. Is it possible they are not
> rated
> > for 6,000#?  I believe a good 3/8 shackle is.
> >
> > John KK9A
> >
> >
> >
> > Mike WB2FKO 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-tb
> > 45d.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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-- 
Steve
*KG5VK*
*Steven Lott Smith*
Tele 318-470-9806
ARRL NTX Section Manager
*Please note: My Out Going Email address is LottsPhoto at Gmail.com*
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