Patent ID: 8091306
Filing Date: 2012-01-10
Classification: E01C,Y10T

Abstract:
1. A metal joint for concrete slabs including means of separating the slabs and means allowing the horizontal movement of slabs relative to each other while avoiding vertical movement between the edges of the slabs, the metal joint comprising: a first part incorporated in a first slab comprising a vertical web made of a sheet metal, the vertical web of the first part having an outer face and an upper edge and being provided with a series of tenons which extend horizontally towards the exterior of the first slab and a second part incorporated in a second slab comprising in its upper section a web made of a sheet metal, the vertical web of the second part having an outer face facing the outer face of the vertical web of the first part, an upper edge and a series of mortice elements which extend towards the interior of the second slab and are arranged opposite the tenons of the first slab so that the series of tenons and mortice elements can engage with each other, wherein the upper edge of each of the first and second vertical webs consists of a folded end portion of the sheet metal folded on itself terminating at the top by a smooth horizontal surface forming a right angle with the respective vertical web, the folded end portion terminating at the top by the smooth horizontal surface extending between a sharp corner forming the right angle and a sharp edge forming an acute angle with the folded end portion folded on itself, the folded end portion being cold rolled and contacting the concrete of the slab.