[TowerTalk] misaligned vertical towers

[Jim Lux]

On 3/21/13 1:00 PM, Steve K7AWB wrote:
>
> I have two towers up.  A 90 foot Rohn 45 with a 6-el 20 meter beam on it
> and
> a 102 foot Rohn 25 without anything on it yet.  Both are guyed.  In putting
> them up, a group of us used a Loos tension meter and our eyesight at the
> bottom of each tower to make them vertical.
>
> But when I look and align the two towers next to each other by walking
> around until they are "next" to
> each other, one or both are off vertically with respect to each other.
>
> How do I figure which is straight and which is off or maybe both are
> slight off?
> I really don't want to climb them now in the bad weather and drop a plumb
> bob and do not have a survey level.  They are really 135 feet apart.
>


How far off from vertical are they?  You might not care.   A foot at 90 
feet is less than a degree. The loads won't be appreciably different.

K7NV's website (http://k7nv.com/notebook/towerstudy/towerstudy1.html) 
shows displacements of more than a foot on a 100 ft Rohn45 tower in a 90 
mi/hr wind.  with aramid guys, displacements were more than 4 feet..