Patent ID: 8910440

Claim:
A prefabricated panel comprising: at least two outer concrete layers provided with metallic reinforcement therein, an intermediate layer made of heat-insulating material arranged between the two outer concrete layers, and a connection system comprising a plurality of plate-like connection elements having a length to allow the connection elements to extend in an orthogonal direction, through the heat-insulating layer and to partially penetrate inside the outer concrete layers, each connection element being provided, at two opposed terminal ends, with respective hooking means to the outer concrete layers, the hooking means being provided at a first terminal end of each connection element and being made up of two distinct C-shaped edges, side by side and parallel to each other, said two distinct C-shaped edges hooking to respective bars provided on the metallic reinforcement of at least one of the outer concrete layers, wherein at the terminal end of the connection element opposite that on which said two distinct C-shaped edges are made, the hooking means are made up of at least a C-shaped edge hooking to the outer concrete layer opposite that to which said two distinct C-shaped edges hook, and/or to one of the bars provided on the metallic reinforcement of said outer concrete layer opposite that to which said two distinct C-shaped edges hook, and wherein said at least C-shaped edge and said two distinct C-shaped edges have a length substantially equal to a height of the connection element, wherein the connection elements are made of a thermosetting resin reinforced with fibres and with a high content of transversal reinforcements.