I have a HSS 6x6x1/4in steel square tube that is 63.5in long. I am trying to determine its maximum load when standing vertically on end (assume it is perfectly vertical and fixed at both ends).(adsbygoogle = window.adsbygoogle || []).push({});

I have calculated the following:

Moment of Inertia = 28.6in^4

radius of gyration = 2.34in

Cross sectional area = 5.75in^2

Modulus of elasticity = 29,000ksi

I then used the formula,

Pcr= (∏^2)*(E)(I)/(.5L)^2

when i do this though I get an answer near 7,000kips or 7,000,000 lbs!! theres no way that can be right and i was wondering if anyone could help me figure this out! Thanks in advance!

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# Maximum Compressive load

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