US Patent 10106972 Precast concrete building elements and assemblies thereof, and related methods

An assembly of concrete structural elements includes a precast concrete lower column, a precast concrete column capital supported on an upper end of the lower column, at least one precast concrete beam supported by the precast column capital, at least one slab supported by the at least one beam, an upper column extending above the lower column, and a poured concrete lap splice connecting the lower and upper columns, a volume of the lap splice being at least partially defined by the lower column, the column capital, the beam, the slab and the upper column. A method of making a lap splice comprises embedding splice reinforcement in each of opposed end of a pair of concrete structural elements such that the splice reinforcement extends out of each approximately as far as the structural reinforcement and overlaps the structural reinforcement within the opposed ends.