For the last 40 years I have been using a 6 foot string at arm's lenth
weighted by a crescent wrench to determine if my towers are vertical or not.
I learned this trick from some power company pole installers in California
in my younger days. You just stand off from the pole or tower about 50 or
100 feet and sight along the string to see if it is parallel to the tower or
To determine 120 degree placement of anchors, I construct a jig from small
wooden sticks about 3 feet long. Two of the sticks are placed at an angle
of 120 degrees from each other and tacked in place with small nails and
other sticks holding them there. You can check the accuracy of this jig by
drawing lines on concrete parallel to the 120 degree sticks and rotating the
jig to draw a third line. You can check the accuracy by placing the jig to
measure the angle between the first and third lines. It should come out
exactly right. If not, fix the jig and do it again. Once you have the jig
made, you can sight down two legs of the jig at a time (with the
intersection of the 120 degree lines of the jig placed right over the center
of the tower) and know right where your anchors ought to be.
----- Original Message -----
From: "Rich Hallman - N7TR" <email@example.com>
Sent: Sunday, June 08, 2003 1:25 PM
Subject: [TowerTalk] Tower Surveying Tools?
> Wondering what everyone is using out there as the "Poor Man's" Transit?
> Installing several towers and wondering what's being used to verify Guy
> anchors are 120 degrees from each other from the base point.
> 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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