I have a 97' Rohn 25 tower mounted on a pier pin. The guys are at 92, 61, and 31 feet above ground. The tower has 2 C-3E tribanders at 69 and 98 feet, and an EF-240 on a 10-foot mast above the top ya
61, and 31 feet above ground. The tower has 2 C-3E tribanders at 69 and 98 feet, and an EF-240 on a 10-foot mast above the top yagi. We're in a pretty benign wind environment. originally set a number
His question is how do you determine the tension requirement for mixed guy materials. I would recommend using the lowest tension that you would get if each material were used for the whole guy... tha
Your "problem" (not sure you have one) is the difference in stretch of the Phillystran vs EHS. Adding more tension to the Philly helps that a bit, but at the cost of a lot more column load on the tow
Other than optimization, is there any reason to change the tension from 400 lbs? Does the tower sway? Do any of the guys sag too much? If not, I would leave the tension at 400 lbs. Why? Tensioning gu
I think I would modify that sentence slightly to say, "...as long as the horizontal component of the tension on all three guys at a given level is the same." If the guys come off the tower at differe
mixed guy materials. Okay. I don't know what the UBS (ultimate breaking strength) of the rods is but I'd go with the steel guys as the ones of interest. The other stuff is just ancillary. 400# for th
Phillystran is ...well a bit flexible (no pun intended) and it's light weight. But that would be like using oversize EHS on the tower. At least you are not adding the extra weight of 1/4" EHS. You mi
Howdy, TowerTalkians -- The tower under discussion is Rohn 25G so my answer to tension the top set of HPTG6700 to 670 pounds might be a little aggressive. It might be a good idea to tension it like t
Hi Steve, I read that if your guy anchors are out more than the prescribed min of 70% of the height then you can drop the 10% guy loading figure to around 8%, Would you care to comment on that? cheer
70% of the height then you can drop the 10% guy loading figure to around 8%, Would you care to comment on that? I haven't heard that before but I'm not an engineer so I don't know if that's true or n
There used to be a good paper on K1TTT's web site that provided some of the engineering basis for answering this question. I can't find it at the moment but perhaps it is temporarily off as Dave reco