Abstract: To render more economical the manufacture of galvanized bar segments 10 illustratively used for three-dimensional frameworks, the components of the bar segments 10, namely the hollow bar 11 and the end pieces 12, are galvanized before being assembled. The ring welds between the galvanized components 11, 12 are implemented by laser welding. Because of the high energy density of the laser welding beam and on account of the narrow ring-weld seams 18 so formed, a zinc coating 24 supplied from the zinc coats 22 of the adjacent components 11, 12 is created during welding and covers each surface 25 of the ring-weld seams, as a result of which, following welding, the bar segment 10 also is provided with a zinc coating 24 covering the surfaces 25 of the ring-weld seams protecting them against corrosion.

Abstract: To avoid a flimsy arrangement of a roof or outside covering composed of individual plate elements on three-dimensional trussing, and also to produce a solid roof or outside covering, holding spaces are provided on the tops of elongated members of the three-dimensional trussing. The spaces have a smooth cup-shaped cross section, into which the outside edges of plate elements are inserted with their parts which are also in cup-shaped cross section, which serves to hold packing strips. First, plate elements are connected with the elongated members by cover rails with downwardly angled arms, which are fastened by screws to each member, and then packing strips are pressed into the cup-shaped outside edges of plate elements, so that plate elements are attached to members of the three-dimensional trussing with packing, which forms a tight roof or outside covering.

Abstract: An intersection joint for wooden members of trusses, particularly in spaceframes, with fixing elements for thread bolts attached on the ends of the wooden members, which are screwed into tapholes of joint elements. The fixing elements are configured as profile parts of one piece (at least in their attachment areas,) and secured into corresponding cutouts in the head ends of the wooden members.

Abstract: A bolt connection between tubular rods and junctions in three-dimensional frameworks wherein the tubular rods are of constant diameter along their entire length and it continues the same beyond the hook-up parts at the tubular rod ends as far as those ends of the hook-up parts which are assembled each with one drive sleeve, and the smallest outside diameter of the drive sleeves being equal to or exceeding that of the tubular rods and of the hook-up parts.