a couple of points:
- it is nice to have the guy wires 5 feet or so down from the top (much
easier to maneuver around the top), provided the tower and wind load are
compatible. They should be in your example.
- it may not be simple to attach the yagi to the mast, while lying
horizontal unless you have some sort of tilting mount or quite a high
"sawhorse" to support it. If you do, fine, otherwise you'll need to do it in
a 2 part lift.
- don't roll up the guy wire, it needs to be laid out straight without any
kinks....
- get 3 extra preforms and use 3 quality come-alongs to position/tension
the guys
properly before fiddling with turnbuckles etc.
73
Don
VE6JY
----- Original Message -----
From: <CCTPAUL@aol.com>
To: <towertalk@contesting.com>
Sent: Wednesday, March 17, 2004 18:15
Subject: [TowerTalk] Using a crane to lift partially assembled
towersections...
Hello All,
Looking for comments / suggestions on the following tower project:
The plan is to install a guyed 70 foot Rohn 25G tower this summer.
I'm fortunate to have a good friend who has a crane who is willing to help
with the installation. Since my friend is kind enough to offer his time and
equipment, I'm trying to come up with a plan that will allow me to have as
much
prep work done as possible before he arrives.
I was thinking of assembling 30 feet of tower and having it in place and
already guyed before he arrives. I believe I could handle this part by
assembling
on the ground and simply tilting into position as I have a 60 foot utility
pole with heavy duty pulleys at the top that is used for various dipoles,
etc.,
that is close enough to easily reach the tower.
Then, if I had the remaining 40 feet already assembled including the KT34A
beam and associated rotor – as well as the guy wires and coax attached to
the
top section and rolled up and temporarily attached to the lower of the top 4
sections and laying supported on the ground … what do you guys think
about
having the crane lift that last 40 feet into position?
While the crane was still supporting it we could attach the guy wires to the
anchors.
I would just have to go up once and unhook the cable from the top of the
tower and my friend could be on his way.
Is this a good idea or am I asking for trouble? (I sure don't want
trouble!)
Questions that come to mind besides just the lifting 40 feet of tower with
the 4 element beam attached into position…
Is the 30 / 70 foot guying OK?
Would it be better to guy at 30 / 65 or ???
Other suggestions or precautions would be welcome.
Thanks,
Paul / K9KDR
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|