two of my 4 towers holding wire arrays were pushed up by hand. they have
hinged bases. 30' of tower with 10' of mast on top. they are Rohn. the 25 is
about 10-15% heavier than 20. i was fortunate to have good sized trees within
the length of heavy rope i have. i always loop the rope[ near the tower top]
and wrap it around a tree or my pick up trucks frame hitch. usually my son
in law & me walk the tower up with a 3rd person keeping the rope taught.
i've never had one slip but the rope is a safety. you never know when a person
walking the tower up could slip down, stumble or be attacked by a bee. that
leaves only 1 person holding everything!
i once pushed up 40' of 25 with a tribander, rotor and vhf antennas. but i
had 5 guys pushing it up. there is strength in numbers. i would never tie to
a chimmeny. can't trust your life to old bricks. if you have to put a rope
over a roof peak to something solid on the other side you won't damage the
shingles unless the tower is lost and the safety rope holds. what's more
important, a shingle or two or everyones safety. you can also build an X or H
frame out of 2x4s and have someone stand next to the tower a work it up as the
tower goes up. i once saw a Rohn 45 tiltover arm bend and drive the boom of a
TH6 6'' into the ground but no one was hurt. you can't undo poor planning
accidents
k9il
_______________________________________________
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.
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