| 摘要 |
<p>The present invention relates to a truss girder (10), for example intended to form a transom in a traffic gantry, where the truss girder (10) is formed with triangular, quadrangular or polygonal shaped cross sectional area, produced of a material suitable for extrusion, and comprising at least an upper chord (13) and a lower chord (14) interconnected by means of inclined braces (16), the chords (13,14) being fabricated separately and thereupon fixed together along their corner edges by means of said braces (16) and having corner elements (15) provided with parallel, outwards projecting fins or projections (31 ) in spaced relation, extending preferably along the entire length of said corner elements (15), and that the inclined brace (16) is extruded, given a shape which is complementary the shape of the space between said fins or projections (31 ), and that the inclined brace (16) and said chords (13,14) being fixed together by means of clamping or clip means (19) locking the inclined brace (16) on to said fins or projections (31 ) of the chord (13,14). The fins (31 ) of the chord (13,14), at portions intended to be connected to the corresponding part of the brace (16), are provided with recesses (39) or projections on the fins or extensions, projecting down into or up from the fins (31 ), while the braces (16) at contact points (17) are provided with projections extending out from the braces (39), or recesses formed in the bracing respectively, said recesses or projections (39) on the fins (31 ) of the chord (13,14) and fins or recesses of the bracing (16) being configured to co-function forming a locking effect against movement of the bracing (16) in axial direction with respect to the chord (13,14). Further the present invention relates also to a method for fabrication of such truss girder (10).</p> |
