Abstract: A joint for constituting a node of three-dimensional spatial framed structures comprises a convex polyhedral base plate from which angularly spaced pairs of wings extend outwardly, each pair forming a gap in which the flattened end of a longitudinal element of the framed structure is adapted to be inserted. The wings are secured either to the solid angles of intersection between the faces of the base plate or along the center lines of the faces thereof. Holes are provided through the wings and faces, and also through the flattened ends of the elements, for bolting the joint to the elements and to diagonal elements to form superposed flat assemblies interconnected in turn by the diagonal elements.