Prefabricated floor element, structure comprising prefabricated floor elements and installation for obtaining the prefabricated floor element

A prefabricated floor element (1) configured to span directly from end to end, bearing at both ends exclusively supported on permanent primary structural members (LS), having a continuous steel reinforcement from one end to the other embedded in the prefabricated floor element (1), having an elongated shape with a longitudinal direction (X), a transversal direction (Y), a height direction (Z), two end faces (11) which delimitate the element (1) in the longitudinal direction (X), two lateral faces (12) which delimitate the element (1) in the transversal direction (Y), a lower face (13) and an upper planar face (14) that delimitate the element (1) in the height direction (Z) are defined, characterised in that the prefabricated floor element comprises transversal continuous upper grooves (15) on the upper planar face (14) that extend from each lateral face (12) and into the upper planar face (14) extending on the upper planar face (14) from a first of the lateral faces (12) through a second of the lateral faces (12).