Question $3$

Suppose you need to select an initial structural shape for the beam BC in the portal frame

below, which is subject to a sustained uniform dead load and a lateral load. Determine the

approximate required flexural $($moment$)$ strength per the LRFD load combinations listed

below:

$1\mathrm{.}4D$

$1\mathrm{.}2D+1\mathrm{.}6L$

Hint: Use Superposition