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The objective of the overall research program is to develop an evaluation procedure applicable to existing NSS-type structures and private homes. Past efforts have been concerned with examining exterior walls, window glass, steel frame connections, applications to actual buildings, and reinforced concrete floor systems. This report presents modifications to the mathematical model previously developed for reinforced concrete floor slabs to include the effect of longitudinal restraint on slab resistance. Also included in the report are the development of the resistance function for predicting the collapse of wood-joist floor systems, and the dynamic inelastic analysis of an eight-story steel-frame office building.