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The seismic dead loads and overturning resistance loads must be entered separately, even though the loads represent different configurations of the same building mass. This is because the program does not yet handle the vertical distribution of loads, and there is no way of knowing how an area load on a floor, for example, needed to specify the distribution of seismic mass, is distributed to the supporting walls.
The program does not include the building masses when determining overturning holddown forces.
A checkbox allows you to use the generated building masses for walls only to generate dead loads on the structure. This is because the Jhd calculations distinguish between the self-weight of the wall and that of other dead loads ont the structure