Starting with the column in Problem 1, perform enough additional calculations to determine the effects of increasing fc from 5000 to 8000 psi on column capacity at both high and low axial loads. Assuming

Starting with the column in Problem 1, perform enough additional calculations to determine the effects of increasing fc from 5000 to 8000 psi on column capacity at both high and low axial loads. Assuming that a compressive strength of 8000 psi is appropriate for the lower stories of a high-rise structure, would you recommend using concrete with fc = 8000 psi for the columns supporting all stories within the building? Use your analysis to support your answer.

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Starting with the column in Problem 1, perform enough additional calculations to determine the effects of increasing fc from 5000 to 8000 psi on column capacity at both high and…

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