Not necessarily, that's keyklamp or something similar, the flanges are solid and as a system it's designed for handrails etc. If you're really after a solid fixing then expanding bolts or threaded bar with chemfix (properly applied) will hold it very solidly (chin up bar solid). If all 4 holes in the flanges have proper fixings with good screws and heavy duty plugs then it should hold.
That would be my concern as well. A virtual single horizontal point of attachment doesn't seem strong enough, like something Frank Lloyd Wright would do in the interest of aesthetics, engineering be damned.
I'm trying to figure a way around this problem in making a pull up bar for my wife.
Think floor standing, the type used in factories to separate walking routes from work areas. Where they are subjected to massive amounts of force from fat bastards leaning on them, badly driven pallet and forklift trucks etc. and still stay standing.
Not necessarily, that's keyklamp or something similar, the flanges are solid and as a system it's designed for handrails etc. If you're really after a solid fixing then expanding bolts or threaded bar with chemfix (properly applied) will hold it very solidly (chin up bar solid). If all 4 holes in the flanges have proper fixings with good screws and heavy duty plugs then it should hold.