gituation $10$

A $300mm$ by $600mm$ rectangular beam is to be designed to carry an ultimate undforin load Wum $210k\frac{N}{m}$ acting over the whole span of a $4m$ aimple beam. Design the beam using $28mm$ diameter main bar. Use $f^{\text{'}}c=21$MPa,$f=415$MPa, atirrupn diameter m $10$trm$,$ and concrete cover $=40mm.$

$28.$ Determine the maximum ultimate moment to be designed.

a$.210kN-m$

b$.420kN-m$

c$.210kN-m$

d$.120kN-m$

$29.$ Determine the maximum steel ratio.

a$.0\mathrm{.}017310$

b$.0\mathrm{.}013710$

c$.0\mathrm{.}011370$

d$.0\mathrm{.}010317$

$30.$ Determine the required As $(m{m}^2).$

a$.2024\mathrm{.}568$

b$.2842\mathrm{.}476$

c$.2204\mathrm{.}568$

d$.2482\mathrm{.}476$