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hello, a mezzanine floor will be added to our newly built (construction-controlled) warehouse building (building importance factor 1.5 hykk 0.8) and it will be converted into a school. We will solve the mezzanine floor by epoxying the beams to the existing columns and adding new columns to the raft. We entered the dimensions and reinforcements of the building from the existing statics. We also entered our mezzanine beams and columns. We made an analysis according to the new regulation by locking the reinforcements of the old building. There is no problem in the verifications of normal force, shear force, deflection problem in slabs and beams, column-beam shear safety, strong column control etc. in the newly added beams-columns-floors. There is no problem in the whole building regarding other irregularities required by the regulation (relative storey drift etc.) ... Only in some of our old columns column-beam shear safety cannot be provided. ..we don't have brittle apples in beams-curtains...we have brittleness problem in only one of our columns. Our performance class has come out as controlled damage(KH).... In this case, can this mezzanine be made? Is it necessary to provide column-beam cutting safety in the analyzes made according to the new regulation on old columns? If necessary, we do not add to any existing structure.