| 摘要 |
The invention relates to a locking system for mechanical joining of floorboards (1) along a vertical joint plane (F), and a floorboard comprisin g such a locking system. For joining perpendicular to the joint plane (F) ther e is a locking groove formed in the underside (3) of a first joint edge at a distance from the joint plane (F), and a portion (P) projecting from the low er part of the second joint edge (4a) and below the first joint edge and, at a distance from the joint plane (F), supporting a locking element (8) cooperating with the locking groove (14), said projecting portion (2) thus being located entirely outside the joint plane (F). The projecting portion ( P) presents at least two horizontally juxtaposed parts (P1, P2), which differ from each other in respect of at least one of the parameters material composition and material properties.
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