The formula for the allowable average compressive unit stress in a long steel column is given as

$F_c=\frac{149,000,000}{(\frac{K}{r}{)}^2}$

A column consists of a $W1240$ with an unsupported length of $24$ ft and end conditions for which $K=1\mathrm{.}0.$

The area of the section is $11\mathrm{.}8$ sq$.$ in$.,$ and its least moment of inertia is $44\mathrm{.}1$ in$.{?}^4$ The maximum axial load that

can be carried safely by the column is

You answered: D

Found in : Mechanics Of Materials, Part $3,$

A$.78,400lb.$

B$.80,100lb.$

C$.79,200lb.$

D$.78,000lb.$