Construction set for the erection of a supporting structure

Construction set for the erection of support structures, comprising supporting rods and at least one connecting joint, said connecting joint containing a plurality of mutually parallel slots open at one end for receiving, in a positively locking manner, suspension heads of said rods which are wider than said slots, said suspension heads being held in said slots by a disk covering said one end of said slots, said slots opening into parallel and approximately cylindrical chambers of said connecting joint, said chambers having equal lengths corresponding to the lengths of said slots, said suspension heads being in the form of thickenings corresponding to the length of said chambers and adapted in shape to the cross-section of said chambers, and thickenings being located on flat pressed ends of said supporting rods, said thickenings being in the form of generally cylindrical beads, said chambers being dimensioned to form a clearance relative to said beads to facilitate the insertion of said beads into said chambers wherein said beads are formed by a rolling-in of the free ends of said flat pressed ends of the supporting rods.