Problem#$2.$ Figure $2$ shows the elevation of a moment frame along with a gravity$-$loadcarrying system. All beams and columns are oriented in their strong axes. The building is subject to dead $($D$),$ live $($L$),$ and wind $($W$)$ loads.

Gravity and lateral load distributions on the frames are shown in Fig. $2.$

Concentrated wind load acting horizontally on the diaphragm: $W=100kN.$

$F_y=275$ steel is used for all beams and columns.

Load combinations to be considered for required strength calculations: $1\mathrm{.}2D+1\mathrm{.}6W+1\mathrm{.}0L$ and $1\mathrm{.}2D+1\mathrm{.}6L.$

Required: Based on the direct analysis method stipulated in the Specification:

$($a$)$ Check if columns are safe.

$($b$)$ Check if the girder is safe.

Fig. $2.$