Frontal butt connection between two roof slab elements of a flat roof and corresponding roof slab element

Abstract

The invention relates a frontal butt connection between two roof slab elements of a flat roof and to a corresponding roof slab element ( 1 ) which comprises undercuts, grooves or pockets ( 8, 9 ) integrated into its profile walls ( 6, 7 ). In this area the pockets of at least one roof slab element are substantially recessed in the form of slots ( 11 ) or a jog ( 15 ), and the apex of the slab can be removed. The slabs can be nested into one another or stacked without the pockets or grooves mutually impeding one another. Especially when the slots or the jog is configured in such a way that they almost halve the pockets next to the upper chord, the remaining pockets enclose the pockets of the subjacent slab. The top slab, in the slot area, is elastic to such an extent that it almost engages into the upper chord of the lower slab. The roof slab elements can be fastened, for example, in the area of the overlapping upper chords or with their slab surfaces resting on the purlin either with one another and/or on the purlin. The invention allows a gap-free butt connection of the roof slab elements despite their projecting pockets.

1 . Butt joint between two roofing sheet elements that comprise undercuts, lugs, or pockets formed in their profile walls, comprising the roofing sheet elements to be abutted, the roofing sheet elements have the same profile cross-section with the same profile size, the roofing sheet elements that overlap each other in the abuttal zone and the undercuts, lugs, or pockets of at least one of the roofing sheet elements are at least removed or cut out in the overlapping zone.  
   
   
       2 . Butt joint according to  claim 1 , wherein the roofing sheet elements lie one on another, at least in the zone of the bottom cords.  
   
   
       3 . Butt joint according to  claim 1 , wherein the undercuts, lugs, or pockets are at least partially removed by slots arranged in their area.  
   
   
       4 . Butt joint according to  claim 1 , wherein the undercuts, lugs, or pockets are at least partially removed by a profile notch.  
   
   
       5 . Roofing sheet element for a butt joint according to  claim 1 , comprising undercuts, lugs, or pockets formed in their profile walls, wherein the roofing sheet elements to be abutted have the same profile cross-section with the same profile size, and on both sides in the zone of the undercuts, lugs, or pockets, the roofing sheet element comprises slots or a notch, which remove the undercuts, lugs, or pockets to a large extent, and extend from the front edge in the longitudinal direction of the roofing sheet element parallel to the sheet cord.  
   
   
       6 . Roofing sheet element according to  claim 5 , wherein, in the area of the undercuts, lugs or pockets, the roofing sheet element is cut out, including the sheet cord, so that the undercuts, lugs, or pockets are removed to a large extent, and the cut-out extends from the front edge in the longitudinal direction of the roofing sheet element parallel to the original sheet cord.  
   
   
       7 . Butt joint according to  claim 2 , wherein the undercuts, lugs, or pockets are at least partially removed by slots arranged in their area.  
   
   
       8 . Butt joint according to  claim 2 , wherein the undercuts, lugs, or pockets are at least partially removed by a profile notch.  
   
   
       9 . Butt joint according to  claim 3 , wherein the undercuts, lugs, or pockets are at least partially removed by a profile notch.  
   
   
       10 . Butt joint according to  claim 7 , wherein the undercuts, lugs, or pockets are at least partially removed by a profile notch.  
   
   
       11 . The roofing sheet element of  claim 5 , wherein the roofing sheet element has an almost trapezoidal profile cross-section.