Problem $(1)$: $-$ A simply supported rectangular beam $350mm$ wide having an effective depth of $)=(600mm$ carries a total factored load of $140k\frac{N}{m}$ on a $5m$ clear span. It is reinforced with $525$ of tensile steel, which continues uninterrupted into the supports. If $f_c^{\text{'}}=25$MPa throughout what part of the beam is web reinforcement required? Use vertical $10U$ stirrups with $f_y=420$MPa where reinforcement is needed. Use equation $22\mathrm{.}5\mathrm{.}5\mathrm{.}1.$b