Locking system and flooring board

A locking system for mechanical joining of at least two floorboards, in which immediately juxtaposed upper parts of adjacent joint edges of the two joined floorboards together define a joint plane perpendicular to a principal plane of floor surfaces of the two floorboards, wherein said locking system, for providing a joining of the two joint edges perpendicular to the joint plane, comprises a locking groove which is formed in an underside of and extends in parallel with a first of the joint edges at a distance from the joint plane, and a portion projecting from a lower part of a second of the joint edges and below the first joint edge, said projecting portion being formed in one piece with a body of the board and supporting a locking element at a distance from the joint plane, said projecting portion thus being located completely outside the joint plane, wherein the projecting portion, as a direct consequence of machining of its upper side, includes at least two horizontally juxtaposed parts, which differ from each other in respect of at least one of the material composition and material properties.

A rectangular floorboard comprising a body and first and second locking means integrated with the body and adapted to provide mechanical joining of adjacent joint edges of such floorboards along the long sides and short sides, respectively, of the boards in a direction perpendicular to the respective joint edges and in parallel with a principal plane of the floorboards, said first and second locking means differ from each other in respect of at least one of material composition and material properties, and that at least one of said locking means at the long side and short side comprises a separate element which is integrally connected with the body of the board at the factory and is made of a material other than that included in the body of the board.

A rectangular floorboard comprising a body and first and second locking means integrated with the body and adapted to provide mechanical joining of adjacent joint edges of such floorboards along long sides and short sides, respectively, of the boards in a direction perpendicular to the respective joint edges and in parallel with the principal plane of the floorboards, said first and second locking means differ from each other in respect of at least one of material composition and material properties, and that at least one of said locking means at the long side and short side comprises an element which is formed in one piece with the body of the board.

A rectangular floorboard comprising a body and first and second locking elements integrated with the body and adapted to provide mechanical joining of adjacent joint edges of such floorboards along the long sides and short sides, respectively, of the boards in a direction perpendicular to the respective joint edges and in parallel with a principal plane of the floorboards, said first and second locking elements differ from each other in respect of at least one of material composition and material properties, and that at least one of said locking elements at the long side and short side comprises a separate element which is integrally connected with the body of the board at the factory and is made of a material other than that included in the body of the board.

A rectangular floorboard comprising a body and first and second locking elements integrated with the body and adapted to provide mechanical joining of adjacent joint edges of such floorboards along long sides and short sides, respectively, of the boards in a direction perpendicular to the respective joint edges and in parallel with the principal plane of the floorboards, said first and second locking elements differ from each other in respect of at least one of material composition and material properties, and that at least one of said locking elements at the long side and short side comprises an element which is formed in one piece with the body of the board.