This research and development effort examines the design and performance of elements required for successful construction of a precast concrete building system that emulates flat-slab construction. The research focused on the development and testing of the rib slab, the column connection, and the precast concrete column capital. The research confirmed the flexural and connection capacity of the rib slab, the flexural and shear capacity of the precast concrete column capital, and the moment-resisting capacity of the precast concrete column connection. The test program identified a lack of stiffness with the column-to-column connection and developed solutions for this connection.
