[TowerTalk] Guy wire tension

[Barry Kutner]

Many thanks to Kurt, K7NV, for his recent tower load analyses. Verrrry 
interesting...

In his examples of guyed Rohn 45 with the base in concrete, the weakest 
point was the lower sections, related to movement of those sections.

His analyses assume the usual standard of the guys being adjusted 
to 10% of their ultimate strength, in these cases 400 lb for 3/16 
EHS or 4000 lb. Phillystran. When larger guys were used, tensioned at 
600 lbs., the safety factor was improved, not surprisingly.

This brings me to the following: I wonder if there 
is engineering/scientific basis for the 10% tension rule? What if 3/16 
EHS or 4000 lb Phillystran were tensioned to 600 lb? Is this unsafe?

Tnx/Barry
--
Barry Kutner, W2UP                            Internet: w2up@mindspring.com
Newtown, PA                                   Frankford Radio Club

                                           

--
FAQ on WWW:               http://www.contesting.com/towertalkfaq.html
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm