Hi Rush,
Why not climb to the top of the sections that are installed and drop a plumb
line down one of the tower legs. Use a 1" spacer between the leg and the
line and make sure that the weight on the end is sufficient to keep the line
tight and kink free. The line should maintain the 1" clearance all the way
donw the length of the leg if it's plumb. Repeat on all 3 legs and you
should have a plumb tower. The other alternative is a surveyors sight but
you'd have to get advice from someone who's skilled in using it (not me!).
Good luck.
73's
Jim WB6YAW
Rush Johnson wrote:
> What is the "proper" way to plumb a 100' guyed 45G tower? I have almost
> finished erecting the tower (it's up to 70' now) and have installed two
> guy stations at 33' and 66' (the last station will be at 99') using
> Phillystran with short 1/4" EHS sections down near the anchors. The
> tower is "plumb" according to my four foot level, but doesn't look that
> way to the eye. Not sure if its an optical illusion (due to the tower
> being in the woods with some really tall trees behind it) or not, but
> want to make sure its "dead on" accurate.
>
> Also, if I use the guys to pull the tower one way or another to
> straighten it up, doesn't this upset the balance of forces on the three
> legs? How much is too much when tensioning the guys to plumb?
>
> Thanks for any advice.
>
> 73,
>
> Rush -- W4QA
>
> --
> Rush Johnson -- W4QA (ex NR4M , WD4AEI)
>
> 100 Horseman Cove
> Matthews, NC 28105-7760
>
> Tel: 704.814.0487
>
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