Two building panels are connected through a column. One panel is bolted to the column, for example by way of fasteners passing through holes in a rib of the panel into threaded inserts in the column. A second panel is also bolted to the column, for example to threaded inserts open to another face of the column. Further panels in an upper or lower story of a building may be connected to the same column such that vertically stacked panels are connected together. In another connection, one end rib of a panel is made to receive a second panel. The second panel can be attached to the end rib of the first panel to make a corner.