The rigid jointed steel frame with a fixed base at support A has to carry both the dead and live loads shown in Figure P7.46.

Both the column and the girder are constructed from the same size members. What is the minimum required moment of inertia of the frame members if the vertical deflection at D produced by these loads cannot exceed 0.5 in.? Use E = 29,000 ksi.

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12' WD = 1.2 kips/ft B 16 6' A C WL = 0.36 kip/ft 12' D