Reinforcement design in the Concrete menu is done using forces calculated with Baumann transformation method.
Detailed information and theoretical background related to this method can be found on the following help pages:
Internal forces 2D
Theoretical background
Design of reinfrocement in the Concrete menu can be different from the result calculated using the Design forces (mxD+, myD+, mxD-, myD-...) given in the Result menu of SCIA Engineer.
Design forces calculated in the Result menu are computed according to ENV: Design internal forces