(Solved): 1) The concrete beam, shown in figure (1), is reinforced with three steel rods placed as shown. The ...

1) The concrete beam, shown in figure (1), is reinforced with three steel rods placed as shown. The modulus of elasticity of concrete is \( E_{\text {conc }}=3 \times 10^{6} \mathrm{psi} \) and that of steel is \( E_{s t}=30 \times 10^{6} \mathrm{psi} \). If the allowable stress for concrete is \( \sigma_{\text {all }}^{\text {conc }}=1350 \) psi calculate (a) The largest allowable positive bending moment and its direction (b) The stress in the steel rods \( (30 \) points \( ) \) \( \frac{7}{8} \) in diameter Figure 1: