Home work examples $6\mathrm{.}1.$ & $6\mathrm{.}2.$ Pages $224-225$

Example Problem $6-1$

A column has a solid circular cross section, $4,25cm$ in diameter; it has a length of $3,5m$ and is pinned at both ends. If it is made from SAE $1020$ cold$-$drawn steel, what would be a safe column loading?

Example Problem $6-2$

Determine the critical load on a steel column having a rectangular cross section, $15$ mm by $24$ mm $,$ and a length of $200$ mm $.$ It is proposed to use SAE $1040$ hot$-$rolled steel. The lower end of the column is inserted into a close$-$fitting socket and is welded securely$.$ The upper end is pinned $($see Figure $6-8).$