Fastening System for Large-Area Metal Roof Coverings or Wall Claddings

Abstract

The invention relates to a fastening system for large-area roof coverings or wall claddings.The object is to create a fastening system which is structurally simple, consists of few parts, is fast to install and is suitable for high negative wind loads.Fastening is achieved within two upwardly projecting longitudinal ribs 2, which are formed by upwardly projecting sheet metal flanks 11. These sheet metal flanks 11 are bent up and provided with projections 13. According to the invention, T-shaped base bars 3 are disposed and fastened within the upwardly projecting longitudinal ribs 2, either continuously or only in some places. The horizontal wide limb of the T-shaped base bars 3, designated as foot limb 5, can be disposed upwardly or downwardly. The T-shaped base bar 3 has recesses 6 formed left and right in the vertical limb of the T-shaped base bar 3 and reaching into the foot limbs 5. Specially formed projections 13 of the sheet metal flanks 11 of the roof elements, sheet metal plates or sheet metal strips 1 engage in these recesses 6. These preformed projections 13 result in a form-fitting joint in conjunction with press plates 9 that can be disposed at or on the central limb 4. The press plates 9 are appropriately fastened with the base bar head 7 in a form-fitting manner or, for example, with screws. The press plates 9 are formed such that the press plates 9 span over the projections 13 of the sheet metal flanks 11 of the roof elements, sheet metal plates or sheet metal strips 1 positioned side by side. This creates a durable form-fitting joint by means of the T-shaped base bar 3 (or base element), central limb 4 and press plate 9. At the upper ends of the upwardly projecting lateral sheet metal flanks 11, the whole longitudinal rib is closed towards the top with a cover strip 12.

1 . A fastening system for large-area metal roof coverings or wall claddings for the fastening of sheet-like roof elements, sheet metal plates or sheet metal strips positionable side by side on roof or wall substructures, wherein the roof elements, sheet metal plates or sheet metal strips are designed flat or corrugated or profiled,
 fastened by means of upwardly projecting longitudinal ribs formed by upright sheet metal flanks and   the longitudinal ribs are distributed across the roof covering or wall cladding in parallel or at an angle relative to each other,   characterized in that   T-shaped base bars ( 3 ) are disposed and fastened in a longitudinal direction within the upwardly projecting longitudinal ribs ( 2 ) on the roof or wall substructure,   recesses ( 6 ) are formed in the T-shaped base bars ( 3 ) left and right on the central limbs ( 4 ) and reach down to the foot limbs ( 5 ),   projections ( 13 ) of the sheet metal flanks ( 11 ) of the roof elements, sheet metal plates or sheet metal strips ( 1 ) engage in these recesses ( 6 ),   press plates ( 9 ) are fastened to the central limb ( 4 ),   with the press plates ( 9 ) spanning over the projections ( 13 ) of the sheet metal flanks ( 11 ) of the roof elements, sheet metal plates or sheet metal strips ( 1 ) positioned side by side and   the sheet metal flanks ( 11 ) along the longitudinal ribs ( 2 ) being closed towards the top using a cover strip ( 12 ).   
     
     
         2 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   the dimensions and shape of the projections ( 13 ) in the sheet metal flanks ( 11 ) correspond with the dimensions and shapes of the recesses ( 6 ) in the central limb ( 4 ) and in the foot limbs ( 5 ) of the T-shaped base bars ( 3 ).   
     
     
         3 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   the two recesses ( 6 ) in the central limb ( 4 ) and in the foot limbs ( 5 ) are formed symmetrically.   
     
     
         4 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   the two recesses ( 6 ) in the central limb ( 4 ) and in the foot limbs ( 5 ) are formed as a dovetail, oval or circular cross-section.   
     
     
         5 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   reinforcement bars ( 14 ) are additionally disposed in the projections ( 13 ) of the sheet metal flanks ( 11 ).   
     
     
         6 . The fastening system for large-area roof coverings or wall claddings according to  claim 5 ,
 characterized in that   the dimensions and the cross-sectional shape of the reinforcement bars ( 14 ) are matched with the dimensions and cross-sectional shape of the recesses ( 13 ) of the sheet metal flanks ( 11 ) and of the press plates ( 9 ).   
     
     
         7 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   press plates ( 9 ) fastened to the central limb ( 4 ) are screw-fastened to the base bar head ( 7 ) at appropriate intervals by means of headed screws ( 10 ).   
     
     
         8 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   the T-shaped base bars ( 3 ) are fastened with the roof or wall substructure by means of base screws ( 8 ) arranged in a staggered or pairwise manner.   
     
     
         9 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   the T-shaped base bars ( 3 ) and/or the press plate ( 9 ) are formed as profile rails.   
     
     
         10 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   the cover strip ( 12 ) is joined to the sheet metal flanks ( 11 ) by means of a form-fitting folded seam oint.   
     
     
         11 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   the T-shaped base bars ( 3 ) and the press plates ( 9 ) are disposed inversely and both are fastened to the roof or wall substructure by means of a central through-going fastening screw ( 15 ).   
     
     
         12 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   the reinforcement bars ( 14 ) consist of stainless steel, aluminium, plastic materials or rubber materials.   
     
     
         13 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   the reinforcement bars ( 14 ) are formed of different materials.   
     
     
         14 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   the reinforcement bars ( 14 ) are formed with linear, helical or locally disposed protrusions ( 17 ).   
     
     
         15 . The fastening system for large-area roof coverings or wall claddings according to  claim 1 ,
 characterized in that   instead of the inserted reinforcement rods ( 14 ), continuous ropes or ropes drawn in under tension and relaxing into place are disposed.