The invention relates to a unitary floor panel (1) for a means of transportation, comprising a self-supporting plate (2) having a smallest dimension, called the thickness, extending along a first direction of the self-supporting plate (2), and two larger dimensions extending along two directions that are orthogonal to each other and orthogonal to the thickness; the self-supporting plate (2) having two opposite sides, called main sides, that extend substantially parallel to the two orthogonal directions; characterized in that the panel comprises at least one beam (5) securely fastened to the self-supporting plate (2) and having an axis of elongation parallel to at least one first main side of the self-supporting plate (2), each beam (5) being designed to increase the flexural strength of the unitary panel (1) along the axis of elongation of the beam (5).