Yes, I had a tower engineered to have one set of guys anchored closer in
than the other two, and closer than the Rohn guidelines. I ended up with
78' of Rohn 45G. The Rohn spec called for two levels of guys with
anchors at 56' from the base. Because of proximity to a property line,
one set of guys was moved in to a distance of 30' from the base. This
was engineered by a Professional Engineer (also a ham). He advised the
following modifications to support the closer guy anchor distance:
-Three levels of guys instead of two, at the 22', 44', and 66' foot levels.
-The short guys were increased from 1/4" EHS to 5/16" EHS.
-They guys anchor block was increased one size from the Rohn spec.
I would advise engaging a Professional Engineer to do the calculations
and supply plans for permitting authorities.
-Tony, K1KP
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|