Lewis What instructions do you have that says 80% of breaking strength? Everything I have ever seen says 10% and the 3/16 wire is 4000#. I still overtighten to about 20% to make it feel secure and it usually stretches and after a few temp changes it ends up being around 15% of the tensile strenghth? I have never tightened to 80%. That being said I still would have the concerns about the pipe bending. I am going to back anchor the pipe and I am going to put some Sonnet tube over it and put concrete up the pole as well for at least 1/2 of the height of the pipe. I have used beam's before as well but I think this pipe I got is actually more rigid than the I beam I used in the past.
----- Original Message ----- From: "Lewis Bergman" <lewis.berg...@gmail.com> To: "AnimalFarm Microwave Users Group" <af@af.afmug.com> Sent: Saturday, September 29, 2018 8:18:47 PM Subject: Re: [AFMUG] Anchor holes You are supposed to tension guys at 80% of breaking tensil strength. On 120 foot 45g that is likely a 1/4 inch guy on top. Maybe 3/16 on the other 3. That and probably 5600 pounds on the top guy and 4400 or so on the others. That means there will be almost 19,000 pounds of pull on that guy point. If you only want the tower for a few years, don't change anything. If you want it longer, I would ditch the pipe, but some 12 inch I beam. Cut the top at a 60 degree angle punch 4 holes. Leave the top flange long, bend it over at 45 degrees and punch 2 holes on it. But if course it is your show. If you give Rohn the info and what you want to do they will give you an engineered solution in a week for free. On Sat, Sep 29, 2018, 6:55 PM Craig House < cr...@totalhighspeed.net > wrote: Planning on putting a sonnet tube over the outside with rebar and reinforcing at some on the outside as well Sent from my iPhone > On Sep 29, 2018, at 18:49, Seth Mattinen < se...@rollernet.us > wrote: > > On 9/29/18 4:29 PM, Craig House wrote: > > It’s 120 foot tall 45G Tower. I’ve already purchased and had the pipe > > welded for planning on putting it in the holes on Monday if I can get > > the holes dug > > > I guess if you're committed to pipe at least fill it with concrete. > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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