The program allows the engineer to specify user-specified seismic and wind cases for rigid diaphragms.

Regarding Seismic Story Forces for buildings with rigid diaphragms, force, direction angle, and the X and Y coordinates are needed to be defined for each diaphragm. By default, X and Y coordinates are at diaphragms' mass centers. If any eccentric loading is needed, the user needs to adjust X and Y locations so that any difference between X, Y coordinates and mass center coordinates is considered as diaphragm eccentricity.

For buildings with semirigid diaphragms, force, direction angle and eccentricities (e_x, e_y) are needed. Note (e_x, e_y) is only applicable for semirigid diaphragms. Refer to User Defined Seismic Load Cases for more information.

Wind Story Forces for buildings with rigid diaphragms, the user needs to enter force, direction angle and wind exposures, in X and Y directions for each diaphragm. Wind percentages (WF, LF) and eccentricities (e_x, e_y) are only applicable for semirigid diaphragms. Refer to User Defined Wind Load Case for more information.