Some design calculations depend on whether the frame is free to deflect laterally (sway) or is restrained by internal or external bracing to prevent side-sway (braced). A sway frame develops all of its horizontal stiffness due to the flexural actions of the columns in the structure. In contrast, the bracing in a braced frame absorbs the horizontal forces and horizontal deflections of the columns are reduced to a minimum.

To set the type of frame

Ø  Choose Frame Type from the Design menu

Ø  Click on type of the frame

Ø  Click OK

The initial setting for the frame type is a sway frame.