A method that is often an effective way to provide seismic resistance to soft-story buildings. Developed in the early 1990s by the AISC Seismic Design Technical Committee, this concept addresses several design issues associated with non-ductile moment resisting systems (NDRMS) and large deformation (LD) of the soft-story level in retail buildings. The committee used both experimental and analytical techniques to develop criteria for assessing frame behavior and the performance of the building as a whole under seismic loading. It establishes a standard design procedure for providing seismic resistance at this weak level in multistory structures, based on the use of braced steel frames (BSF) or moment-resisting steel frames (MRF).