Abstract | This paper presents the preliminary findings of a case study, undertaken for enhancing the vibration performance of an industrial two-way composite slab subjected to impact loads as well as for the seismic retrofitting of the entire building. Struts as well as toggle-bracedamper configurations have been effectively combined to achieve the aforementioned twofold goal. With respect to the vibration control of the slab, provided that the availability of the field measurements was not enough to undertake a full forensic engineering study, the proposed strengthening scheme in both directions was selected so as the resulting system fundamental frequency (i.e. beam and girder combined mode) would lie well above the minimum recommended values. Furthermore, in the girder direction, these struts were aligned in a toggle-brace-damper configuration in order to: (a) Employ shallow trusses, due to operation-related restrictions, while (b) magnifying the vertical slab displacements associated with the impact load and (c) the horizontal deformations imparted by seismic loads to this stiff building so that the dampers experience increased velocities and maximize their effectiveness at both the serviceability and the ultimate limit-state.