Answer:
RF‑PUNCH Pro determines the punching load not by adding the support loads, but directly from the shear forces of the plate in the control perimeter.
When compared to a control calculation, a discrepancy might occur in the results, as the punching load is influenced by the FE mesh and possibly also by singularity effects in the FE calculation.
A detailed description of the method used in RF-PUNCH Pro can be found in the technical article of our Knowledge Base.