[TowerTalk] EHS cable and torque bars

[Steve Maki]

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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