Question: he steel I - section shown has width 1 5 0 mm , height 1 5 0 mm and flange and web thickness 1 2

he steel I-section shown has width 150 mm, height 150 mm and flange and web thickness 12 mm. The I-section is encased in a solid circular concrete column with diameter of 200 mm and compression failure stress of 11 MPa. Calculate the minimum steel compression failure stress for the concrete encased steel column to have a strength of at least 2000 kN.(Answer in MPa)

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