I rig like that all the time and it can be done with a Rohn gin pole. You
just have to ignore the pulley that Rohn provides and get a double pulley
for the top of your block and tackle with a hook on it and place the hook
over the top of the gin pole.
Stan
w7ni@easystreet.com
----- Original Message -----
From: "jljarvis" <jljarvis@adelphia.net>
To: <towertalk@contesting.com>
Sent: Friday, July 12, 2002 12:33 AM
Subject: [Towertalk] ginpole redux
>
> kk1l observed that I wasn't thinking clearly, with
> respect to possible pulley scenarios and ginpole loads.
> It IS possible to reduce the load on the pole, by using
> a 2 part tackle on the LOAD side of the ginpole:
>
> >
> > O T fixed to top of pole 150# total
> > | | |
> > | | |
> > | | |
> > | O
> > | V
> > | LOAD 100#
> > |
> > |
> > V
> > 50#
>
> Now comes the question...anybody see a way to actually RIG a
> pole like that? The rohn top casting/block doesn't provide
> an easy way. A through-bolt would get in the way of the
> LIFT line, in the pole. The fixed line, at 't', would have to
> be fastened to a clamp of some sort.
>
> Jim/N2EA
> _______________________________________________
> Self Supporting Towers, Wireless Weather Stations, see web site:
http://www.mscomputer.com
> Call 888-333-9041 to place your order, mention you saw this ad and take an
additional 5 percent off
> any weather station price.
> _______________________________________________
> Towertalk mailing list
> Towertalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
|