Answer:
With the default setting of the settlement calculation in RF‑/FOUNDATION Pro, the foundation plate is analyzed as an "elastic plate".However, export of the support spring constants from RF‑/FOUNDATION Pro is only available if the calculation was previously performed as a "rigid plate".
For this, open "Details" and "Settlements Settings" and select "Iterative calculation of contact pressure for solid foundation plate". See Image 01.
After the calculation for solid foundation plate, there is the option to export support spring constants available in the file menu of RF‑/FOUNDATION Pro. See Image 02.
