Metal Profile Member To Be Used As A Formwork Assisting In The Construction of Metal/Concrete Flooring

Abstract

The invention relates to a formwork ribbed metal profile member assisting in the construction of metal/concrete flooring, including longitudinal edges ( 2, 3 ) defining upper ( 4 ) and lower ( 5 ) areas connected by webs ( 6 ) and comprising recessed deformations, characterized in that at least a portion of each web comprises a recessed deformation ( 60 ) defined by a continuous line which extends parallel to the longitudinal direction of the profile member, and the length of which is greater than that of said portion of the web in said longitudinal direction.

1 . A ribbed metal profile of the participating formwork type for constructing steel/concrete floors, comprising longitudinal corners delimiting upper and lower regions connected by webs and comprising reentrant deformations, characterized in that at least part of each web comprises a reentrant deformation delimited by a continuous line running parallel to the longitudinal direction of the profile and the length of which exceeds that of said part of the web in this longitudinal direction. 
     
     
         2 . The profile as claimed in  claim 1 , characterized in that said deformation extends over the entire length of the web. 
     
     
         3 . The profile as claimed in  claim 1 , characterized in that it further comprises at least one reentrant deformation in at least part of the upper and/or of the lower regions, which deformation is delimited by a continuous line the length of which is greater than said part of the upper and/or lower regions. 
     
     
         4 . The profile as claimed in  claim 3 , characterized in that said deformation extends over the entire length of the upper and/or lower regions. 
     
     
         5 . The profile as claimed in  claim 1 , characterized in that said line is broken, symmetric or otherwise, for example crenellation(s). 
     
     
         6 . The profile as claimed in  claim 1 , characterized in that said line is a sinusoid. 
     
     
         7 . The profile as claimed in  claim 1 , characterized in that, in the webs, the lower regions and/or the upper regions, the reentrant deformations are present in pairs and symmetrically. 
     
     
         8 . The profile as claimed in  claim 1 , characterized in that it comprises stiffeners in the webs and/or the upper regions. 
     
     
         9 . The profile as claimed in  claim 1 , characterized in that it comprises bends in the lower regions. 
     
     
         10 . The profile as claimed in  claim 1 , characterized in that it comprises, in its webs, a protruding bulge that runs longitudinally. 
     
     
         11 . A method for obtaining a metal profile as claimed in  claim 1 , comprising the following steps:
 (a) flattening a metal sheet of set thickness,   (b) producing, in the longitudinal direction of the metal sheet, two reentrant deformations delimited by a line that is continuous and of which the projection in the plane of the metal sheet is in two dimensions, symmetrically with respect to a longitudinal central line of the metal sheet, and over at least part of the length of the sheet,   (c) repeating step (b), the deformations being, each time step (b) is performed anew, further away from said central line than the previous time it was performed,   (d) deforming the profile to obtain substantially parallel longitudinal ribs or half-ribs, in which at least said webs have said deformations.   
     
     
         12 . The method as claimed in  claim 11 , in which grooves are produced between two implementations of step (b), these grooves, after step (d), constituting stiffeners. 
     
     
         13 . The method as claimed in  claim 11 , characterized in that longitudinal and protruding bulges are produced after implementation of step (b), at the deformations intended to be present in the webs. 
     
     
         14 . The method as claimed in  claim 11 , characterized in that, after step (d), the profile comprises reentrant deformations in its webs, on the upper regions and/or on the lower regions of said ribs. 
     
     
         15 . The method as claimed in  claim 11 , comprising, after step (d), a step consisting in producing stiffeners on the upper and/or lower regions of the ribs. 
     
     
         16 . The method as claimed in  claim 11  consisting in producing, before or after step (d), at least one bend on the lower regions of the profile. 
     
     
         17 . A machine for manufacturing a profile as claimed  claim 1 , this machine being equipped with at least one pair of rollers of the toothed wheel type, each tooth upsetting metal to form a reentrant deformation. 
     
     
         18 . The application of the profile as claimed  claim 1  to the production of a participating-formwork floor. 
     
     
         19 . A participating-formwork floor obtained with a profile as claimed in  claim 10 , in which at least one brace is arranged in a cavity of the profile, bearing against the bulges.