Sheet metal plate with reliefs for creating industrial flooring over which trucks are to run, engraved cylinder for obtaining such sheet metal plates by rolling

Sheet metal plate for making floors, in particular floors for industrial vehicles, on which trucks are to run, said sheet having on its upper surface a plurality of patterns, each pattern comprising one or more protrusions, called “reliefs”, said patterns being arranged periodically, discreetly and in orderly fashion, the maximum height of said reliefs being between 0.2 and 1.5 mm, said reliefs having a “friction” surface, which is defined by the intersection of a relief with a plane (P) parallel to the surface of the sheet and located midway between the top of said relief and which, regardless of the direction in which it is measured, has an average width of at least 0.7 mm, characterized in that it comprises more than 3000 reliefs per m2, where said reliefs are arranged in a plurality of aligned groups, i.e., a plurality of groups of reliefs in which the reliefs of each of said aligned groups have the same shape, the same direction and have their centers of gravity-substantially aligned in the same direction (D), the minimum distance measured along said direction (D) between two adjacent reliefs of the same aligned group is always less than 6 mm, said aligned groups being so arranged that the minimum distance in the direction perpendicular to (D) between two adjacent reliefs of two different aligned groups is less than 15 mm.