[Hendog]

I want to raise an antenna 6 to 8 feet. The rated lateral thrust @ 100mph wind is 39 lbs. It's 86" long and weighs 12.6 lbs. Mounting instructions say 1.9" OD mast. It's currently mounted to an 8inch beam as you can see in the pictures. What kind of pipe would I need to raise it 6 to 8 feet using existing mount? 1.9" OD pipe 8 feet long is what I need but how thick? I've done some reading on pipe and such but am not well versed on the subject. I'm not an engineer. Would Schedule 40 steel galvanized be overkill? Aluminium?