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Fig shows a vertical stepped post A, B and C whose upper and lower post are of dia 30mm and 50mm respectively. A vertical load W1 = 12KN is applied at top post and additional load W2 is

uniformly applied around B. Calculate i)The normal stresses at the upper post ii) It is desire that stress in the upper and lower post is the same find W2

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σ1=loadarea=W1A1σ2=W1+W2A2

Case (i)σ=?for upper post

σ1=PA=12×103π4×302=16.97N/mm2

Case (ii) It is given thatσ1=σ2W1A1=W1+W2A216.97=12×103+W2π4×502W2=21.32×103N

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