Determine the positive nominal flexural strength Mn of the T-beam in the figure below. Assumef'=21MPA and fy = 420MPA

The initial compressive force of a steel column can be determined by Euler's buckling formula. The column has the following properties: A = 9484 mm² Fy=345 MPa x = 164 x 106 mm4 ly = 23 x 106 mm4 Proportional limit, fs = 290 MPa The x-axis has an unbraced length of 10 m which is pinned at the top and fixed at the bottom with an k = 0.70. The y-axis has unbraced length of 5 m due to the bracing at the mid-height. Compute the initial compressive load of the column. Select the correct response: 6606.59 KN 3706.14 KN E = 200 GPa 1816.01 kN 926.53 kN