Question

\text { 7. Given } f_{c}^{\prime}=5,000 p s i \text { (Normal Weight Concrete, } 145 \text { lbs } \sqrt{f}^{3} \text { ). } (a) Follow the ACI code

to estimate f' (modulus of rupture) and E. (modulus of elasticity)for the concrete beam shown above.

Fig: 1

Fig: 2

Fig: 3