The invention relates to an assembly method for forming a seating structure for a vehicle seat, having a cross support (2) and a side support (3). For this purpose the cross support comprises at least one detent means (15), and the side support has at least one complementary detent means (8). During assembly, the detent means and the complementary detent means engage in each other, wherein the side support and the assembly support are positioned substantially perpendicular to each other. The cross support encompasses the side support for the engagement. The invention further relates to a seating structure produced in this way.