I thought the whole point of a fall arrest lanyard is the internal
connections release at reduced load so the falling climber is decelerated
somewhat gently to a non-injurious stop as the lanyard stretches. Would
think a tower cross-brace is more than adequate to handle that.
73, Don N7EF
On Sun, Sep 6, 2020 at 7:28 PM Ken K6MR <k6mr@outlook.com> wrote:
> Thinking out loud here, and as an EE not an ME.
>
> If you clip onto a vertical leg, when the fall arrest deploys, the only
> thing stopping the Gorilla hook from sliding down the vertical member is
> the cross brace where it is welded to the upright. Common sense says that
> it will wedge itself into the ‘V’ created between the cross brace and the
> tower leg.
>
> If you clip onto a cross brace, the Gorilla hook will slide down the cross
> brace and stop at the weld between the tower leg and the cross brace.
> Again, it will be wedged into the ‘V’ between the two. There will be
> virtually no leverage on the cross brace, so the chances of the cross brace
> bending away from the tower would seem to be almost nil.
>
> The only way I could see either method failing is if the weld pulled away
> from the leg. What am I missing?
>
> Ken K6MR
>
> From: Stephen Shobe<mailto:info@pioneerantenna.com>
> Sent: Sunday, September 6, 2020 19:14
> To: Kim Elmore<mailto:cw_de_n5op@sbcglobal.net>
> Cc: towertalk@contesting.com<mailto:towertalk@contesting.com>
> Subject: Re: [TowerTalk] How to Clip on with a Fall Arrest Lanyard
>
> My advice as a certified tower climber is to always use the legs of the
> tower with your fall arrest system. Cross members have weld points subject
> to failure if the load is significant. And remember, none of the connecting
> points are engineered fall arrest points
>
> On Sun, Sep 6, 2020 at 18:47 Kim Elmore <cw_de_n5op@sbcglobal.net> wrote:
>
> > Would you mind being a bit more detailed about this? What it is,
> >
> > exactly, and how you manage it? I think I know, but I want to be
> >
> > certain. Also, if there's a permanently-installed a safety line on a
> >
> > tower, what's required to properly use it?
> >
> >
> >
> > Kim N5OP
> >
> >
> >
> > On 9/6/2020 4:17 PM, K9MA wrote:
> >
> > > I’ve been using a 5/8 inch lifeline and a rope grab. It takes one trip
> > with the gorilla hooks to put it up, and another to take it down, but all
> > the other trips are much easier.
> >
> > >
> >
> > > 73,
> >
> > > Scott K9MA
> >
> > >
> >
> > > ----------
> >
> > >
> >
> > > Scott Ellington
> >
> > >
> >
> > > --- via iPad
> >
> > >
> >
> > >> On Sep 6, 2020, at 12:05 PM, Dick Green WC1M <wc1m73@gmail.com>
> wrote:
> >
> > >>
> >
> > >> 4. All this further convinces me that a safety cable is the best way
> to
> > climb a tower. I plan to install one on my Rohn 55 tower provided I can
> > find one with enough clearance to pass through the three TIC rings on my
> > tower.
> >
> > > _______________________________________________
> >
> > >
> >
> > >
> >
> > >
> >
> > > _______________________________________________
> >
> > > TowerTalk mailing list
> >
> > > TowerTalk@contesting.com
> >
> > > http://lists.contesting.com/mailman/listinfo/towertalk
> >
> > --
> >
> >
> >
> > Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP
> >
> > SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)
> >
> >
> >
> > /"A great second violinist plays second fiddle to no one." //– Robert C.
> >
> > Marsh, Chicago Sun-Times./
> >
> >
> >
> > _______________________________________________
> >
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> >
> > TowerTalk mailing list
> >
> > TowerTalk@contesting.com
> >
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
> > --
> Stephen K. Shobe
> Pioneer Antenna & Tower
> 25182 Derby Cir
> Laguna Hills, Ca. 92653
> 949.235.9202
> _______________________________________________
>
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