Patent ID: 7954294

Claim:
A building panel ( 1 ) having a major plane and being configured to interengage with at least one other adjacent like panel, the panel ( 1 ) having: two major side surfaces ( 16 ) which are at least substantially parallel to the major plane, and at least three major edge surfaces ( 2 , 3 ) substantially forming a perimeter ( 4 ) of the panel ( 1 ), at least one said major edge surface ( 2 , 3 ) including an alternation of at least one inwardly stepped portion ( 5 ) and at least one outwardly stepped portion ( 6 ) along it; each said inwardly stepped portion ( 5 ) having a major edge surface forming a first surface segment ( 5 ) of a said major edge surface ( 2 , 3 ); each outwardly stepped portion ( 6 ) having a major edge surface forming a second surface segment ( 14 ) of a said major edge surface ( 2 , 3 ), and two major side surfaces each forming a side surface segment ( 15 ) of a respective major side surface ( 16 ) of the panel ( 1 ); at least one said inwardly stepped portion comprising an engaging means first portion ( 7 ) at said first surface segment ( 5 ); and at least one said outwardly stepped portion ( 6 ) comprising an engaging means second portion comprising three parts ( 17 , 17 , 13 ) situated respectively at the two side surface segments ( 15 ) and at said second surface segment ( 14 ), each said part being adjacent to at least one other said part whereby each inwardly stepped portion ( 5 ) is dimensioned to receive an outwardly stepped portion on a major edge surface of an adjacent like panel and the engaging means first portion ( 7 ) is latchingly engagable with any one of the engaging means second portion parts ( 13 , 17 ) of said adjacent like panel enabling the major planes of the two panels, when interengaged, to be selectively substantially parallel and coincident or substantially perpendicular.