A square steel tube having the cross section shown is used
Chapter 10, Problem 10.81(choose chapter or problem)
A square steel tube having the cross section shown is used as a column of 26-ft effective length to carry a centric load of 65 kips. Knowing that the tubes available for use are made with wall thicknesses ranging from \(\frac{1}{4} \text { in. to } \frac{3}{4} \text { in. }\) in increments of \(\frac{1}{16} \text { in. }\), use allowable stress design to determine the lightest tube that can be used. Use \(\sigma_{Y}=36 \mathrm{ksi} \text { and } E=29 \times 10^{6} \mathrm{psi}\).
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