Hard floor panel with a core made of a wood-based material board, a wood-based material-plastic board or a plastic board with an upper side and a bottom side and with side edges (10, 20; 30, 40; 50, 60; 70, 80) along the sides of the panel for floating installation forming a flooring panel network, whereby at least two floor panels are joined together, wherein the opposite side edges (10, 20; 30, 40; 50, 60; 70, 80) are provided with tongue and groove profiles, wherein a tongue (11, 31, 51, 71) and a joining surface (16, 36, 56, 76) are provided in a first lateral edge (10, 30, 50, 70) and a groove (21, 41, 61, 81) and a joining surface (26, 46, 66, 86) are provided in a second opposite lateral edge (20, 40, 60, 80), wherein the spring (11, 31, 51, 71) of the first side edge (10, 30, 50, 70) has an upper side (12, 32, 52, 72) and a lower side (13, 33, 53, 73); wherein a projection (14, 34, 54, 74) with a contact surface (15, 35, 55, 75) is provided on the lower side (13, 33, 53, 73) of the spring; wherein the joining surface (16, 36, 56, 76) of the first side edge (10, 30, 50, 70) extends from the upper side of the floor panel to the upper spring side (12, 32, 52, 72), wherein the groove (21, 41, 61, 81) in the second side edge (20, 40, 60, 80) has an upper side and a bottom side, wherein the upper side of the groove (21, 41, 61, 81) is defined by an upper lip (22, 42, 62, 82) and the lower side of the groove is defined by a lower lip (23, 43, 63, 83); wherein a recess (24, 44, 64, 84) with a contact surface (25, 45, 65, 85) is provided in the lower lip (23, 43, 63, 83) of the groove (21, 41, 61, 81); wherein the joining surface (26, 46, 66, 86) of the second side edge (20, 40, 60, 80) extends from the upper side of the floor panel along the upper lip (22, 42, 62, 82), wherein, in the assembled state of at least two floor panels, the projection (14, 34, 54, 74) of the tongue (11, 31, 51, 71) engages in the recess (24, 44, 64, 84) of the lower lip (23, 43, 63, 83) of the groove (21, 41, 61, 81) so that the contact surfaces (15, 35, 55, 75; 25, 45, 65, 85) of the projection (14, 34, 54, 74) of the tongue (11, 31, 51, 71) and the recess (24, 44, 64, 84) of the lower lip (23, 43, 63, 83) of the groove (21, 41, 61, 81) exert a tensioning force on each other; characterized in that the joining surface (16, 36, 56, 76) of the first side edge (10, 30, 50, 70) is bevelled and is inclined inwardly from the upper side of the floor panel, away from the vertical and away from the spring (11, 31, 51, 71), in that the joining surface (26, 46, 66, 86) of the second side edge (20, 40, 60, 80) is also bevelled and is inclined inwards from the upper side of the floor panel away from the vertical towards the groove (21, 41, 61, 81), so that the angle between the upper side of the panel and the respective bevelled joint surface (16, 36, 56, 76; 26, 46, 66, 86) of the side edges is no longer perpendicular but forms an acute angle between 85° and 89°, and that when the bevelled joint surfaces (16, 36, 56, 76; 26, 46, 66, 86) of the side edges of the tongue profiling and the groove profiling in the joined state of at least two floor panels come into contact with each other, forming an angle between the bevelled joint surfaces at the contact points of the bevelled joint surfaces, a line pressure along the bevelled joint surfaces (16, 36, 56, 76; 26, 46, 66, 86) occurs.