Abstract: The assembly node is formed from flat elements connected together; at least one first flat element comprises a slit situated in the middle of its width, said slit being orientated in the longitudinal direction of the flat element, and at least a second flat element is engaged in this slit and passes therethrough. The first flat element extends in the longitudinal direction of the slit on each side of the second flat element; the first flat element comprises means for securing bars on each side of the second flat element in the longitudinal direction of the slit so that the transmission of forces by the first flat element on each side of the center of the node is effected essentially parallel to the longitudinal direction of the slit, through continuity of the material forming the first flat element.