# [TowerTalk] Plumbing a tower using a plumb bob

Pat Barthelow aa6eg@hh.tmx.com
Mon, 18 Oct 1999 21:07:22 -0700 (PDT)

```Hi Tom,

Take a ruler and measure the center to center distance between legs,
divide in half, measure and mark the horizontal tower rung with that half
leg distance.  Run a string from the opposite leg and tie right at mark in
center of the rung.  Do the same for another leg/rung. where the strings
cross, is the exact center of the tower.   You do not have to be so
precise though...You can simply suspend the bob from a stick or
screwdriver lashed to and protruding from the tower, observing it's
distance and angle
outside a given leg, and look for a similar spacing at the bottom of the
tower....

73, DX, de
Pat, AA6EG/N6IJ;
aa6eg@hh.tmx.com;n6ij@hotmail.com
599 DX Drive, Marina CA 93933
See us on the web: www.polkinghorn.org/n6ij
"The Contest Station from the Government"

On Mon, 18 Oct 1999, Tom H wrote:

>
> Hey 'tawkers,
>
> I'm trying to figure a way to find the center of a triangular tower so I can
> drop a plumb line from near the top, down to the bottom.  This seems to me
> like a good way to find true vertical other than using a transit.  What I'd
> like to do is to criss-cross a string from one tube to the other to form a
> center cross hair of sorts, one at the top, and one at the bottom, and hang
> a plumb bob from the top cross hair.  But without an opposing tube, this is
> pretty hard to do.  There's gotta be a better way to do this than how I'm
> figuring.  Any suggestions?
>
> Thanks,
> Tom K3GM
> FM29
>
>
>
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