Thanks for your reply. Yes the figure I posted was a face view. As you suggested, side view would be just like any tilt-up tower, guyed in both direction at the top and probably at two other points. So I thought no use to post that. Sorry if there was confusion in my post. I may have to guy the side of the A frame too...??

Must I understand that the towers that another poster sead were around for decades are totally freestanding? It is not what I wanted since I want something easy to access for maintenance and I don't want to have to climb although I think it might be fun the first time but not if I had to do it every year.

I understand 80 ft is high and I would have to make sure everything is calculated to withstand the loads. 80 ft is not totally set in stone yet. Our lot is 2 ha and is sloping towards incoming dominant winds. Trees are not as high as 60 ft yet but will be in a few years. I Just wanted to know if anyone had tried this. So, has any of you?