A mild steel pin-ended column is 2.5m long and has the cross-section shown in Fig. P.18.7. If the yield stress in compression of mild steel is 300N/mm2, determine the maximum load the column can withstand using the Robertson formula. Compare this value with that predicted by the Euler theory.

  

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8 mm 6 mm 184 mm 8 mm 130 mm 8 mm 6 mm 184 mm 8 mm 130 mm