Must be below the frost freeze line so there is no upheaval of the base
next to the house foundation movement. Cause the house footer to be
damaged.
Don't cut on the base it come back to haunt you. Rule of thumb is for
every 10 foot up in the air you go down deep 1'. A 40' high go deep 4'
to equal the base out.
N9IWW
Kevin Adam
1239 W. Till Rd.
Fort Wayne IN. 46825
219-490-7312
http://www.fortwayneradioclub.net/n9iww
n9iww@mail.com
-----Original Message-----
From: owner-towertalk@contesting.com
[mailto:owner-towertalk@contesting.com] On Behalf Of Mike King
Sent: Wednesday, July 04, 2001 8:45 PM
To: TOWERTALK@contesting.com
Subject: [TowerTalk] Rohn 45 Fold over questions and House Bracket
Hi all,
I was researching the Rohn catalogue on Rohn 45 house bracketed towers
and
the fold over version as well. Looking at non guyed about 44' high.
A few questions:
Looking at the instructions for the Rohn 45 Foldover tower document (Doc
#D-2526), it says to dig the tower base 3' deep. The Bracketed tower
foundation plan (Drawing #A880445R1) says to dig it 4' deep. Any big
deal
here? If 3 feet is enough, so much the better.
Also, the house bracket TVROHB - shows that it attaches to two legs of
the
tower. (base of the tower cross section triangle parallel to the wall)
In the fold over documentation, it indicates in many places where a
house
bracket can be used in lieu of guying at the hinge point.
The fold over documentation also says if installing adjacent a building,
make sure the hinge is at right angles to the wall to allow the tower to
fold over without the boom assembly hitting the house, this part make
sense.
However, if that is the case, how does one attach the house bracket then
to
only one leg? Or in that case does it actually attach to all 3 legs?
(Base
of the tower cross section triangle at a right angle to the wall)
Now, I can handle it if I have to have the tower fold over on the roof,
but
would rather it fold to the ground. Anyone have experience with this?
Is
there any interference from the house bracket to the boom assembly?
Seems
to me that there would be a problem with this if the tower folds down
parallel to the wall, the boom assembly would fold down into the side of
the
TVROHB.
Or in this case, would one use the HBUPM? This however would not follow
the
prime directive. I dont think I saw the two systems described
together...
Additionally, can someone comment on the bracketed Rohn 45 chart on
bracket
elevation. As for instance, they all show two heights, a lower and
upper.
If the Upper is higher than the building, such as for the 40' tower
unit,
30', then what does someone do? I dont see any specs that show how high
one
can go with a bracket in the 20' range, other than the fold over specs
where
it indicates that the house bracket be within 2' of the hinge.
Any thoughts? Ideas? Suggestions...
Thanks
Mike- KM0T
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List Sponsor: Are you thinking about installing a tower this summer? Call us
for information on our fabulous Trylon Titan self-supporting towers - up to
96-feet for less than $2000! at 888-833-3104 <A
HREF="http://www.ChampionRadio.com";>
www.ChampionRadio.com</A>
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