I “mis-spoke”. Technically the two dipoles are the resonant radiating elements. They are mounted to a piece of pipe at a specific distance (1/4 wave in this case), which defines the radiation pattern of the antenna. The elements have their co-ax cables, combined into one cable, running inside the pipe and terminating out the bottom to one connector. The piece of pipe, two elements, co-ax and connectors are manufactured as an "antenna". Clamping onto the lower portion of the antenna in order to mount it does not change the resonance of the antenna system: That is already determined by the two dipoles. Their spacing relative to each other and to the distance from the pipe to which they are affixed determine the radiation pattern. I can mount the “antenna” to any mast if I like. I could even mount it to the side of a tower if I chose to. It would affect the radiation pattern to some degree in that case but not the resonant frequency.

If we forget about the antenna for all intent and purpose, I would like to focus on the applied force to the mast I want to use elevating my “load”. After more research, I believe I’m trying to solve for a “cantilevered” force rather than a bending moment. I have already calculated the cantilevered force, which is expressed in lb-ft (like torque). Now I just need to know whether a particular 8ft pipe say 2” galvanized 18 gauge will stand the calculated force. I can reach out to the manufacturer of the antenna and ask their engineer. I have his name and number. I just thought I would pose the problem here to the “brain trust”.

The documentation is for the landlord. If they accept my documentation then I’m good to go.

Are guy wires out of the equation?

I’m a Professional Engineer. PM me if you want help with this.

The antenna manufacturer recommends 2" SC40 (2 3/8 OD) aluminum pipe.

I may still require PE stamped drawings so I might be sending you a PM yet Uncle. Thank you for the offer.