[TowerTalk] Restoring a Tristao CZ-454 Tower

[NPAlex at aol.com]

Neil,
When dealing with crank-up towers you have to remember the various sections 
move as a "system".  This means if you shorten a section, that new length 
determines the extended length of each other moveable section.  The reason is the 
lifting cable for that short section must also be shorten correspondingly.  
That then limits the travel.  To be safe you would have to adjust the "lift" of 
the first section as though it were shorter (a limit switch can do this).  I 
would "rebuild" the top twisted section by looking into substituting Rohn 25, 
welded to the original Trisato  top section "bottom end" and maintain the 
correct overall length.  You may have to reform the preceeding section top guides to 
accommodate the substitute structure.

Regards,
Norm W4QN
=============================================
True Dan, I suppose I could use the tower as is,but I am sure that 
others on this list have had to deal with a twisted top tower section. I 
thought about somehow strapping that one section down and trying to use 
a piece of pipe to see if I could actually get the twist to come back 
some.Your right about the rotor,as that is my Biggest concern, that the 
top section and the rotor plate (about 5' down the section) will not 
line up correctly,and what problems that will incur down the line.
I was hoping to learn from actual experience's that fellow tower owners 
have had,but,at the end of the day, I am probably just going to cut the 
2' of twisted section out and re-weld the top plate and lower the rotor 
platform also 2',hence a Tristao " 52' " foot tower.
Thanks for your thought's Dan,appreciated.
73
Neil
AE1P



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