This is from a former contractor who did major work in Chicagoland.
I did a lot of layout and used this system on previous tower installations.
Cheap and accurate.
Get one of those cheap laser level/pointers.
Get two 1/2 boards about 3' long.
Place them parallel to each other and camp them with wood spacers equal to
the diameter of a tower leg.
This will look like:
Slide the gapped part from one tower leg through to the other side.
Lay your laser/pointer on the spacer. (beam pointing away from the tower) HI
REMEMBER: DO NOT LOOK INTO LASER BEAM WITH REMAINING GOOD EYE!!!!
Take a stick high enough to receive the laser spot and when you have the
spot on the stick, pound it in the ground.
Use a tape measure from tower to make all three/four sticks equal in length.
This is a lot easier and less bother than a transit or using strings,
especially if there is bushes/trees in the area.
I've done this a couple of times and it's REAL quick and accurate.
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