A guy I know here is a ham radio buff, and has quite a rig. He is putting up a new antenna tower, and has offered me his old one. It is typical antenna truss. face are 5 inches center to center between any two of the thee parallel tubes, and was built in two sections 12 foot each out of 3/4 EMT tubing and 1/8 rod making the angled cross bracing between each pair of main tubes - so the cross braces are welded to the main tubes every 10 inches along each tube. Antenna truss is incredibly strong stuff and will take really high side-loads. Full width on any one side, outside of tube to outside of tube, is 5.75 inches. Too clear that width, the BB width needed is right at 6 inches, then of course you have the crank and pedal width. I'm thinking about using it as the main beam for a tadpole trike. I'd like some input, please. Is that too wide to be practical for a BB? Suggestions, anyone?