Question: A singly reinforced concrete beam section is shown below. The concrete compressive strength is fc=5000 psi the longitudinal reinforcement is 3 #9 Grade 60 bars.

A singly reinforced concrete beam section is shown below. The concrete compressive strength is fc=5000 psi the longitudinal reinforcement is 3 #9 Grade 60 bars. Although not shown, the section has stirrup transverse reinforcement. 1. Compute 1 for the specified fc. 24 in 2. Compute the depth of the Whitney stress block, a. 12 in 3. Compute the nominal flexural strength, Mn, for the section. 4. Draw a strain profile for the section at the point where Mn is reached. Report and label c, the depth to the neutral axis, on your drawing. 5. Draw a stress profile for the section at the point where Mn is reached. Show the depth of the WSB, a, and all relevant information including the concrete stress and the steel stress along with dimensions. 6. Compute the strain in the tension steel when the section reaches Mn

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