Question

In your first month as a junior engineer in a structural engineering consulting company, you were asked by your supervisor to check a design calculation that was previously completed by a senior engineer. The beam in question is part of a floor system, simply supported, and subjected to an ultimate positive moment, Mu, of 835 kip.ft. In the current design, the beam is 14 in x 30 in and has 6 #10 rebars as the tension reinforcement as well as 2 #9 rebars as the compression reinforcement. After you analyzed the capacity of the beam, you found that the nominal moment, Mn, of the beam is 849 kip.ft and the net tensile strain, εt, is 0.00442. The senior engineer must have forgotten to apply the strength reduction factor! According to the canons in NSPE and ASCE Codes of Ethics, what should you do in this case? Cite the appropriate canon(s). Then, what can you recommend to fix this problem if the beam dimensions can no longer be changed due to architectural and other requirements? Provide the rationale

In your first month as a junior engineer in a structural engineering consulting company, you were asked by your supervisor to check a design calculation that was previously completed by a senior engineer. The beam in question is part of a floor system, simply supported, and subjected to an ultimate positive moment, Mu, of 835 kip.ft. In the current design, the beam is 14 in x 30 in and has 6 #10 rebars as the tension reinforcement as well as 2 #9 rebars as the compression reinforcement. After you analyzed the capacity of the beam, you found that the nominal moment, M, of the beam is 849 kip.ft and the net tensile strain, ε, is 0.00442. The senior engineer must have forgotten to apply the strength reduction factor! According to the canons in NSPE and ASCE Codes of Ethics, what should you do in this case? Cite the appropriate canon(s). Then, what can you recommend to fix this problem if the beam dimensions can no longer be changed due to architectural and other requirements? Provide the rationale. 6.

Answer 1

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