Alan,
I have been able to single handed erect some supports that apparently
defy consideration by some. Without additional information it's difficult
to give you specifics. A 40 foot mast that starts out 2" OD at the bottom
should have some rigidity to offer stability, unless it's real flimsy.
In any case, I would concentrate on the middle set of guys. And I would
concentrate on temporarily managing 3 of the 4 ropes at that level. This
would give you 120 degrees on the compass while raising the support.
I have tied "bricks" to the two opposing guys and let them drag along
the ground as I pulled on the opposing guy. This technique presupposes
a tilt base mechanism. And you have to gauge the appropriate weight
of the two bricks or it can topple as you near the vertical position. The
counterweights can come flying toward you if they're not heavy enough!
It sounds like your case is to lift your mast 4 feet and drop it into the
cemented pipe sticking out of the ground. If this is so, it adds a degree
of difficulty that I would not attempt in a solo attempt! In that case I would
have 5 people involved. One on each of the (middle) guys and someone
to make the lift into your mount at the center.
Someone probably has links to the "falling derek" type of installation
that allows you to erect even taller masts by yourself. You should take
a look at this method and reconsider your options.
73 de Bob - KØRC in MN
Message: 9
Date: Mon, 6 Oct 2008 08:57:55 -0700 (PDT)
From: Alain Michel <opalockamishabob@yahoo.com>
Subject: [TowerTalk] Guying a 40' Fiberglass Mast...Alone
To: towertalk@contesting.com
Message-ID: <666286.12734.qm@web56307.mail.re3.yahoo.com>
Content-Type: text/plain; charset=us-ascii
Hello All,
I sent the post below to the "antennaware" section of our group list. Someone
suggested that i send it to you kind folks in the event there are more ideas
and
suggestion to be had here.
Best of 73!
Alan...KI6HPO
Hello All,
This mast is going to support the feedpoint of my 204' G5RV.
The 2" bottom mast will slide into an 8', 2 3/8" galvanized fence post,
which is set into 4' of concrete. The spot is on a 25% grade; this
caused me some concern regarding the length of my guy ropes, but I
believe that I've got enough 3/16" Dacron to complete the job.
I am going to tie the Dacron ropes [to galvanized thimbles and then] to
spikes at four [compass] points on the ground, outside the 33'
diameter circle from the center post. Guy points on the mast will be at
16', 23' and 30'.
I plan on leaving 20"+/- of each spike above ground.
What is the best way for one person to get the mast as perpendicular to the
ground as possible, while running from "point to point" to last down
the mast while it's teetering?! My wife and I attempted to lash down
this unruly 40 footer in a very light wind on Sunday, with little success!
I'll be handling 12 long guy ropes, so any assistance from anyone who's done
this alone [or with one's XYL/OM!] would be most welcomed!
Anything I'm forgetting?
Many thanks for taking the time to respond!
Alan...KI6HPO
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