can be passed through the through holes 32 122 in order to connect the node and the brace 11 in part b of the diagram a brace 11 is connected at its lower end to a upward facing clevis 30 of a node 20 b the step of fastening the brace to the node is carried out while the leg is held in the jacket assembly guide part c of the diagram shows a flanged connection between a further node 20 e and a brace 11 in a jacket structure according to the invention here the node 20 e and brace 11 are joined by means of a flange to flange joint the node 20 e comprises a cast tubular extension 26 arranged at a suitable angle to meet the brace 11 here the tubular extension 26 is shown to point upward for connecting to a lower end of the brace 11 and comprises a flange 25 at its outer end the brace 11 also has a corresponding flange 121 at its lower end the flanges 25 121 are connected by means of suitable short bolts fig8 shows a pin bolt 70 in this case an expansion bolt 70 for connecting a brace to a clevis node in a jacket structure according to the invention the expansion bolt 70 comprises an inner cylinder 72 with a constant internal diameter and a tapering external diameter and an outer cylinder 71 with a constant external diameter a tapering internal diameter and a longitudinal split the cylinders 71 72 are arranged around a threaded shaft 73 the external diameter of the outer cylinder 71 fits relatively closely inside the gusset through hole the expansion bolt 70 is assembled between the clevis walls 33 and.