Answer:
When performing structural calculations, the derivation of forces from the roof to the foundations is one of the central tasks of the calculation, in addition to the dimensioning of the cross-sections.
In a 3D building model, this force flow is ensured automatically by the coherent modeling of ceilings, columns, walls, foundations, and so on. Sometimes, however, you deliberately decide against modeling on the entire model, which then means that you have to perform the load transfer manually.
The "Import Support Reaction as Load…" function is also available for RFEM 6. This FAQ shows how to use the new load wizard: