<p>This paper presents the development and application of collapse-based design as a novel framework for seismic design of structures. The collapse spectrum is presented as a tool to determine the appropriate seismic intensity for structural collapse. A formula is provided to calculate the median seismic intensity for collapse across various structural models. In this procedure, the intersection of the median collapse intensity and the median collapse probability on the collapse fragility curve is selected as the design target point, incorporating the collapse margin ratio directly into the analysis and design process through a novel approach. This paper also defines an optimal limit for performing incremental seismic analyses and employs the endurance time technique for fast and accurate structural analysis up to the calculated median seismic intensity for collapse. Additionally, design criteria for structural components are developed based on a collapse scenario under seismic intensities representing the maximum expected structural capacity. The proposed framework is applied to the eccentrically braced frame (EBF) system, offering collapse-based design guidelines for this type of structure. Models designed using this method are compared with those designed using conventional approaches. In this study, EBF system models are analyzed using both concentrated and distributed plasticity approaches, demonstrating that they can remain stable under a seismic intensity three times greater than the design basis earthquake while maintaining optimal structural weight. The results of this research suggest that seismic design can be achieved without relying on traditional principles, indicating that collapse-based design is a viable alternative to conventional methods.</p>