Supporting element (1) for exhibition structures, in particular display structures made of cardboard, comprisinga main body (10), made of a cut of a construction material with folding mounting tabs (11,12), which are attached to the lower surface of the support element and are formed with diagonal buckling edges (13), through which a tab with L-shaped side profile is formed,characterized by:the diagonal buckling edges (13) of the mounting brackets (11, 12) are at an angle (α) to the transverse edge (14) of the bracket.
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