Locking system and flooring board

A floorboard system comprising a plurality of floorboards, wherein each of the floorboards is a rectangular floorboard provided with long edges and short edges and a locking system for mechanical joining, both vertically and horizontally, the floorboards along the long edges as well as the short edges thereof,

• wherein immediately juxtaposed upper parts of each pair of joined long edges of the mechanically joined floorboards together define a long joint plane which is perpendicular to a principal plane of the joined floorboards;
• and
• each such pair of joined long edges comprises:
• a first long joint edge having a tongue and having a locking groove that is formed in an underside of and extends in parallel with the first long joint edge, at a distance from the long joint plane, and
• a second long joint edge having a tongue groove, which cooperates with the tongue for providing the vertical locking, and a projecting portion integrated with a floorboard body and projecting from a lower part of the second long joint edge, below the first long joint edge, said projecting portion being located entirely outside the long joint plane as seen from the side of the second long joint edge and supporting, at a distance from the long joint plane, a locking element which cooperates with the locking groove for providing the horizontal locking;
• wherein said projecting portion of the second long joint edge of the floorboard has a material composition other than that of the floorboard body, the projecting portion of the second long joint edge presents at least two horizontally juxtaposed parts, which differ from each other in respect of at least one of material composition and material properties, and
• said two parts are located at different distances from the long joint plane and comprise:
• an inner part, closest to the long joint plane and an outer part, at a distance from the long joint plane,
• said inner part being formed of a worked part of the floorboard body and of a part of a separate strip,
• said worked part of the floorboard body, included in the inner part, defining an extension of a lower part of the tongue groove, and
• said strip being attached to said worked part of the floorboard body.

A floorboard system comprising a plurality of floorboards, wherein each of the plurality of floorboards is a rectangular floorboard provided with long edges and short edges and a locking system for mechanical joining, both vertically and horizontally, the floorboards along the long edges as well as the short edges thereof,

• each pair of joined long edges comprises:
• a first long joint edge having a tongue and having a locking groove that is formed in an underside of and extends in parallel with the first long joint edge at a distance from the long joint plane, and
• a second long joint edge having a tongue groove, which cooperates with the tongue for providing vertical locking, and a projecting portion integrated with a floorboard body and projecting from a lower part of the second long joint edge, below the first long joint edge, said projecting portion being located entirely outside the long joint plane as seen from the side of the second long joint edge and supporting, at a distance from the long joint plane, a locking element which cooperates with the locking groove for providing the horizontal locking;
• each pair of joined short edges comprises:
• a first short joint edge having a tongue and having a locking groove that is formed in an underside of and extends in parallel with the first short joint edge at a distance from the short joint plane, and
• a second short joint edge having a tongue groove, which cooperates with the tongue for providing vertical locking, and a projecting portion integrated with a floorboard body and projecting from a lower part of the second short joint edge, below the first short joint edge, said projecting portion being located entirely outside the short joint plane as seen from the side of the second short joint edge and supporting, at a distance from the short joint plane, a locking element which cooperates with the locking groove for providing the horizontal locking;
• said projecting portion of the second short joint edge of the floorboard is formed in one piece with the floorboard body,
• the projecting portion of the second short joint edge presents at least two horizontally juxtaposed parts, which differ from each other in respect of at least one of material composition and material properties.