INSTRUCTIONS: All the steps must be clearly shown. Whenever a value or any other information comes from book or code, table number and$/$or page number should be clearly mentioned. If any value that you need for calculations is not given, assume and state the basis of your assumption $($based on book, reasoning etc.$).4.$G as $4\mathrm{.}9$ in this example$)$

$(50$ points$)$ Determine $M_n$ for a beam of cross section shown in figure $1,$ where $f_c^{\text{'}}=4$ksi. Assume $f_y=60$ksi. Calculate the strain on steel when the concrete strain is $0\mathrm{.}003$ and compare it with yield strain of steel. $E_s=29{10}^3$ksi

PID $6383973$