Answer:
The design of lifting loads is performed in RF‑/FOUNDATION Pro under the name of "Uplift limit state design".
In this context, it means not only the floating of the foundation in relation to the groundwater level, but also the occurrence of lifting or negative support forces.
The uplift limit state design can be activated in "Details" of the add-on module or it is activated by default when creating a new design case See Image 01.
In order to design the dimensions of the foundation, the program iteratively increases the foundation dimensions until the uplift limit state design is fulfilled.
