1] The concrete beam, shown in gure [1}, is reinforced with three steel rods placed as shown. The modulus of elasticity of concrete is Em = 3 x 10 psi and that of steel is E\" =4 30 x 10' psi. If the allowable stress for concrete is on\" = 1350 psi calculate (a) The largest allowable positive bending moment and its direction (b) The stress in the steel rods 1' m = (30 points) i-II i 7 .8 in diameter Figure l