QUESTION 4 1. The span length and cross section of a reinforced concrete beam ar

Question

QUESTION 4 1. The span length and cross section of a reinforced concrete beam are shown. The beam is underreinforced. The concrete and reinforcing steel properties are 3000 lbf/in, f, 40,000, lbf/in2, and A, 3 in 5 ft live load, dead load, wo-5lbfft 12 in steel reinforcing bars 18 in 15 in A beam cross section 10 ft Neglecting beam self-weight and based only on the allowable moment capacity of the beam as determined using American Concrete Institute (ACI) strength design specifications, the maximum allowable live load is most nearly (A) 23,000 lbf (B) 29,000 lbf (C) 35,000 lbf (D) 50,000 Ibf A. B. C. D. QUESTION 5

Explanation / Answer

1. C

The maximum allowable live load is nearly 35000 lbf

3. B

The minimum amount of shear reinforcement required is 0.12 in2

9. B

The effective flange width is 54 in.

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