For a simply supported beam $($T$-$section: bw $=300mm,$ be $=600mm,h=600mm,hf=100$

$mm)$ reinforced with $4\frac{O}{14}mm,$ Consider $f^{\text{'}}c=30$MPa, fy $=420$MPa and $d=550mm.$ Answer

the following:

a$-$ Determine the maximum area of steel in the beam section that is allowed to have a singly

reinforced concrete section $($use LRFD method$)$

b$-$ Verify if the section is under, over or balanced reinforced