A reinforced concrete beam having the cross-section shown is on a simple span of 28 ft. It carries uniform service loads of 3.60 kips/ft live load and 2.20 kips/ft dead load. Check the adequacy of the beam with respect to the moment. Use f'c = 3000 psi and fy = 40,000 psi.
A) The beam is adequate with a safety factor of 1.2
B) The beam is inadequate, requiring reinforcement
C) The beam is adequate with a safety factor of 1.5
D) The beam is adequate with a safety factor of 2.0
