The equations presented require the use of the "right-hand rule" sign convention. While RAM Concept allows you to set your own sign conventions for reactions, it will internally apply the correct signs to the equations.

RAM Concept reports the reactions applied from the column to the slab. The reactions are the forces and moments that would need to be applied to the column joint in order to keep the system in equilibrium if the columns were removed. This can be envisioned by removing the column from the structure and replacing it with the reported reactions applied at the column centroid. Refer to the following figure for clarification.