When static loading is applied in the X direction, net reaction in the Y direction will be zero, though individual reactions may be nonzero, depending on the type of structure. For example, when a single-story frame system with four columns, arranged in a square plan with interconnecting beams at the roof level, is subjected to a horizontal point load in the major direction at the top of one column, torsion will cause horizontal support reactions in the direction orthogonal to loading.
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