The invention relates to strips (1, 1 ') with longitudinal grooved edges that can be joined to form a floor. The proposed design differs in that the strips have a groove (3) on their right-sided profile, made essentially perpendicular to the surface of the plank and having a recess (5) on the side of the groove opposite to the side edge of the plank, as well as parallel chamfers (7, 9) directed towards this edge and located at an angle of approximately 45 ° relative to the side edge, which in the process of laying interact with the protrusion (19) of the left-side profile of the strap, having a shape that is responsive to the specified groove (3), in re Ultimately, thanks to the chamfers (7, 9), it is possible to insert the protrusion (19) at an angle of approximately 45 ° into the groove (3) and lock the two successive bars into the lock with a simple push. The international application was published together with the international search report .
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