| 摘要 |
<p>1. A generally U-shaped section member intended in particular for the construction of coverings, of the type comprising a web (7) having on each side wings (9a, 9b) bordered by edge portions (10a, 10b) which are folded outwardly and terminate in flanges (11a, 11b) extending toward the base of the U, characterised in that each wing (9a, 9b) comprises a first part (12a and 14b, 12b and 14b) and a second part (13a, 13b), each edge portion (10a, 10b) and each first part (12a and 14a; 12b and 14b) projecting toward the interior of the U, said first part (12a and 14a; 12b and 14b) being connected to the corresponding edge of the web by the second part (13a, 13b) which is perpendicular to this web and acts as an abutment for the respective wings of two juxtaposed section members, so that, upon the assembly of two juxtaposed section members, the first parts (12a and 14a, 12b and 14b) and the adjacent edge portions (12a, 12b) of these section members form a box structure by the reciprocal interengagement of the edge portions (10a, 10b) and the flanges (11a, 11b).</p> |
