Abstract: This invention concerns a set of assembly elements consisting of assembly rails fitted to engage each other along a nodal line, and which may be intended for the assembly of sheet elements; the individual rail may be attached along the edge of each sheet element by its underside by generally known means, such as screws, glue or tongued and grooved joints; the cross-section of the individual assembly rail consisting of a basic part and a hook-shaped part; at least the basic parts, duly assembled, will bear against each other, preferably along radial surfaces.