Patent ID: 8266863

Claim:
A kit comprising plate members and a joining element for joining the members that are adjacent along their narrow faces, the members having grooves incorporated into the narrow faces, the grooves being parallel to a visible surface and having groove walls that are parallel to each other, and the joining element that is associated with the adjacent members being insertable into the grooves of the members and bridging a gap between the members in a manner of an external tongue, the joining element including the external tongue and a web that protrudes at a right angle at a longitudinal center of the external tongue on its side that faces away from the visible surface of the members, from which detent webs protrude on both sides, each of which detent web has a detent projection that projects toward the external-tongue, and on an underside of each member, detent grooves being are provided that run parallel to the narrow faces and which align with said detent projections on the detent webs, wherein a lateral extension of the external-tongue and the detent webs are approximately equal and wherein the underside faces away from the visible surface.