structures the invention permits the production of nodes with any number of stubs which adequately distance the brace welds from the surface of the leg thus ensuring that cautious safety limits are observed such braces being set at any desired angle to the leg according to this invention in a tubular truss structure built of long tubular elements called legs interconnected by transverse elements called braces through intermediate elements called nodes each having at least one connecting element called stub between leg and brace the stub is prepared starting from a steel plate according to a method characterized by the following sequence of operations namely creating a protuberance on said heated part by forming on a female die bringing the radius of curvature of the curved and formed piece thus obtained to that of the leg extruding the formed and pierced part to final shape of stub by assembling at least one of the pieces thus obtained with at least one curved plate a node is formed for mounting on a leg the curved part of the piece obtained by u bending the plate is heated to a temperature between 950 u00b0 and 1200 u00b0 c so as to permit rapid hot forming of the piece in the following stage preferably in a single operation deformation of.