Retaining Rail for Roofing Membranes

Abstract

Retaining rail ( 1 ) for holding down roofing membranes of flat roofs comprises a web ( 13 ) and lateral edge folds ( 14,14 ′). The web ( 13 ) is provided with openings ( 11 ) for attaching fastening means ( 10 ). Each of the lateral edge folds ( 14,14 ′) forms bearing-side shoulders ( 21,21 ′). The web ( 13 ) lies above the bearing plane ( 26 ) defined by the bearing-side shoulders ( 21,21 ′).

1 . A retaining rail for holding down roofing membranes in flat roofs, which retaining rail comprises a profile having a web and lateral edge folds, the web being provided with openings for affixing fastening means, characterized in that each of the lateral edge folds forms at least one bearing-side shoulder, the web being situated above the bearing plane defined by the bearing-side shoulders. 
   
   
       2 . The retaining rail as claimed in  claim 1 , wherein each of the two edge folds is multiply folded in meandering fashion such that, starting from the web, the profile of this retaining rail has a first fold leading toward the bearing plane, which first fold is followed by a second fold which leads away from the bearing plane and which forms a first bearing-side shoulder, which second fold is followed by a fold leading back toward the web. 
   
   
       3 . The retaining rail as claimed in  claim 1 , wherein each of the lateral edge folds forms a plurality of bearing-side shoulders, the web being situated above the bearing plane defined by the bearing-side shoulders. 
   
   
       4 . The retaining rail as claimed in  claim 3 , wherein each of the two edge folds is multiply folded in meandering fashion such that, starting from the web, the profile of this retaining rail has a first fold leading to the bearing plane, which first fold is followed by a second fold which leads away from the bearing plane and which forms a first bearing-side shoulder, which second fold is followed by a third fold which leads toward the bearing plane and which forms a comb, which third fold is followed by a fourth fold which leads away from the bearing plane and which forms a second bearing-side shoulder, which fourth fold is followed by a fifth fold leading back toward the web. 
   
   
       5 . The retaining rail as claimed in  claim 2 , wherein the first fold has a curvature of 30°-90°, preferably 45°. 
   
   
       6 . The retaining rail as claimed in  claim 2 , wherein the second fold has a curvature of 60°-180°, preferably 135°. 
   
   
       7 . The retaining rail as claimed in  claim 4 , wherein the third fold has a curvature of 60° or more, preferably 180°. 
   
   
       8 . The retaining rail as claimed in claim  claim 4 , wherein the fourth fold has a curvature of 60° or more, preferably 180°. 
   
   
       9 . The retaining rail as claimed in  claims 2 , wherein the fifth fold has a curvature of 30°-150°, preferably 90°. 
   
   
       10 . The retaining rail as claimed in  claim 3 , wherein the first bearing-side shoulders are situated in the same plane as the second bearing-side shoulders. 
   
   
       11 . The retaining rail as claimed in  claim 1 , wherein it is fabricated from a rust-protected material, in particular stainless steel or hot-dip galvanized steel. 
   
   
       12 . The retaining rail as claimed in  claim 1 , wherein its material thickness is 2 mm or less, in particular 1.5 mm or less.