I have two uncles that were high-rise construction workers back in the 60's, 70's and 80's. Heard a few horror stories but for the most part, they both said that walking on those I-beams at 30, 40 or 50+ stories off the ground became second nature.
I sure as hell couldn't do it. I can't imagine the stain I'd get in the back of my shorts the first time even a slight breeze arose.

Not just NO, but HELL NO!