Cold-formed　steel　framed　shear　wall　is　an　increasingly　popular　lateral　system　for　mid-rise　buildings　in　the　US　due　to　its　non-combustibility　and　high　constructability.　This　paper　presents　a　recently　completed　test　program　at　the　University　of　North　Texas　to　investigate　the　behavior　and　performance　of　this　lateral　system　when　a　bi-axial　load　(lateral　and　vertical)　was　applied.　Both　cyclic　and　monotonic　tests　were　conducted　to　simulate　wind　and　seismic　loading　conditions.　Two　types　of　the　steel　sheet　walls　were　tested:　shear　walls　and　bearing　walls.　The　test　results　were　primarily　used　to　establish　non-linear　dynamic　finite　element　models　for　a　series　of　cold-formed　steel　frame　building　archetypes.　Incremental　dynamic　analyses　(IDA)　were　performed　to　analyze　the　seismic　performance　of　the　building　archetypes　and　a　set　of　seismic　performance　factors　(SPF)　were　obtained　through　the　IDA　analyses.　The　results　verified　the　existing　SPF　in　the　US　codes.　The　research　also　showed　that　the　bearing　wall　could　have　significant　impact　to　the　seismic　behavior　of　the　mid-rise　cold-formed　steel　frame　buildings.　The　paper　also　presents　an　analytical　approach,　Effective　Strip　Method,　to　design　the　cold-formed　steel　sheet　shear　walls.　The　method　provides　the　engineers　an　alternative　way　to　determine　the　shear　strength　without　conducting　full-scale　shear　wall　tests.