In moderate-seismic regions, cost-effective steel building design solutions such as the R = 3 and Ordinary Concentrically Braced Frame (OCBF) systems cannot be expected to consistently provide reliable life-safety protection because the collapse performance behaviors of these systems are not thoroughly substantiated by experimental or historical evidence. Thus, a numerical study consisting of 2 conventional and 216 parameterized variations of a prototype seismic force-resisting system (SFRS) was developed to: (1) investigate low-ductility braced frame failure mechanisms and collapse performance capabilities; (2) quantify the influences of key design parameters on probabilistic collapse capacity; and (3) provide the basis for development of a robust and socioeconomically viable design alternative for low-ductility concentrically braced frame (CBF) systems. The numerical models were developed in the Open System for Earthquake Engineering Simulation (OpenSees) framework, and collapse probabilities were assessed through numerical simulations of ground motion excitations using the incremental dynamic analysis (IDA) procedure.