Bonus-6 Due date: Thursday, Dcember 13th

Columns AC, AD, and BD are carrying the gravity load of( W) and Horizontal load of (0.1 W) (Fig. 1). The columns section is shown in Fig. 2.The columns are made out of steel with modulus of elasticity of E=2.1×106 kg/cm2. How much is the maximum W (in Kg) in order that the columns do not buckle (P<Pcr).

1.Structure

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2.Column Section