Read the whole post On Sat, Sep 29, 2018, 10:14 PM Craig House <cr...@totalhighspeed.net> wrote:
> 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. > > ------------------------------ > *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 > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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