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Reinforced & Prestressed Concrete · Question 1

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medium

Component Design — RC flexure and shear

A rectangular reinforced concrete beam is $b=12$ in wide with an effective depth $d=20$ in (overall depth $h=22.5$ in). It is reinforced in tension with four No. 8 Grade 60 bars ( $f_y=60$ ksi), and $f'_c=4{,}000$ psi. The design flexural strength $\phi M_n$ is most nearly:

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