Abstract: The invention is directed to structural elements for use in triangulated structures, and structures assembled from such elements. In particular the invention provides an elongated structural element for use in a triangulated structural assembly, provided at at least one end thereof with connector means adapted for pivotal connection directly to at least one further structural element about a pivot axis which is transverse to the longitudinal axis of the structural element and which is disposed outside the general envelope of the structural element itself. The arrangement is such that from two to as many as one hundred such structural elements may be interconnected at a structural node without the use of an intermediate nodal member.