A rectangular concrete beam is subjected to a factored moment (Mu) of 345 kip*ft. The beam has the following properties:
- f'c = 5500 psi
- fy = 60,000 psi
- h = 39 in
- d = 36 in
- b = 18 in
Determine the required area of steel for this case.
A) 8-#5 bars
B) 3-#8 bars
C) 3-#6 bars
D) 11-#4 bars