I am in planning stages of a similiar installation. I am a EE by training, so
tend to be overly conservative on structural issues. I am an expert in the true
sense - I know what I don't know.
With regard to the base, are you going to rotate only the top sections? I plan
to install the rotor at the base, using RTS's hardware. My CE buddies say the
"intuitively stronger" base section buried in concrete is in counter-intuitive
fact weaker and is only recommended for unguyed installations of 3 or 4
sections. They say use the pin. So does Rohn.
If you are not doing an installation per the Rohn specs then you need a PE to do
the calculations (unless you have a much higher affinity for risk - physical,
financial, and bureacratic- than I) and having a pin simplifies the calculations
Re guying - if you are not using factory specs, have a PE do the calculations.
I think rules of thumb in this deal are going to be more like a thumb in the
Also, I am planning to use two sets of three anchors each and elevate the ends
of the guys to avoid vandalism and/or abrasion of the planned Phillystran.
Let me know what you end up with. What antenna complement do you plan?
73.......... John N5CQ
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