Sorry for the previous blank post - I'll try it again. I'll second the observations made by W8JI - you've got the wrong material. I've always gone by the 60/40 rule for elevated guys - 40% in the hol
FWIW I am not an engineer nor even a TOWER TECH but I might toss in a tidbit. Round pipe filled with concrete does add more bending resistance - but it will snap like a pretzel when the concrete gets
This is the way it's done with the large grain elevators. I was servicing antennas on one today guyed this way. this was a 150' structure with multiple heads on it, and it's quite stable, much nicer