: Compression Members

A built$-$up section is used as a compression member, W$200$X$72$ section is connected to C$225$X$30$ as

shown in the figure below. The effective lengths of the columns are $K{L}_x=9m,$ and $K{L}_y=4\mathrm{.}5m.$

Determine the following: Use $F_y=250$MPa. Show your solution and put your answer the table below,

a$.$ ASD axial Compressive Strength

b$.$ LRFD axial Compressive Strength

Properties $ofW20072$

$A_v=9100m{m}^2$;$,d=216mm$

$I_{\text{v}\text{e}\text{f}}=76\mathrm{.}6{10}^{6}m{m}^4$;$I_w=25\mathrm{.}3{10}^{6}m{m}^4$

Properties $ofC22530$ :

$A_c=3790m{m}^2$;$x_n=14\mathrm{.}8mm$;$t_c=11\mathrm{.}4mm$

$I_e=25\mathrm{.}3{10}^{6}m{m}^4$;$I_{e\text{:}}$