The base plates at the bottoms of the columns are connected to the foundațions at points A and D by bolts and may be assumed to act as pin supports.

Joint Bis rigid. At C where the bottom flange of the girder is bolted to a cap plate welded to the end of the column, the joint can be assumed to act as a hinge (it has no significant capacity to transmit moment). Compute the reactions at A and D. Given: X= 4 kips. The magnitude of the reaction at A is Ax= kips, and the direction is The magnitude of the reaction at A is Ay=kips, and the direction is The magnitude of the reaction.at D is Dx =kips, and the direction is The magnitude of the reaction at D is Dy= kips, and the direction is