hello.......i have been told to put a guy wire every ten feet of height....and at 120 degrees around the pole....therefore 3 wires at every ten feet....i am told this will stop the oscillating of the pipe and you won't have a problem with aresonating pole......i have an engineering background and could probably give you more certain advice if needed, but for the most part, i don't think that it's necessary.......i guess we could get technical and say that the moment of inertia for a triangle is 1/3rd from the biggest side......maybe someone else can give some better insight but generally speaking all who have used the pipe you have used seem to be doing o.k......there are lots of other alternatives, but seeings you already have the pipe.....hoist er away!...take care....pickster
