Exercise23.7 A column of hollow rectangular cross-section and made of steel plates is shown in Fig. 23.13. The thickness of the section is 2.5 mm throughout. The plate material is steel 30C8 (S 400 N/mm and E= 207 000 N/mm). The end fixity coefficients can be taken as 1.5 and 1 for bending about long and short axes respectively. The effective length of the column is 1 m. Determine the load capacity of the column from buckling consideration. 2.51 20 30

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