The cross sections of the columns and girder of the frame in Figure P13.9 are identical. Carry out an approximate analysis of the frame by estimating the location of the points of inflection in the girder. The analysis is to include evaluating the support reactions and drawing the moment curves for column \(A B\) and girder \(B C\). Check the results by moment distribution. \(E I\) is constant.

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B A 20 m P = 38 kN w = 3.6 kN/m 20 m D 5 m