A structural joint for attaching two boards by their butts, achieving the correct transmission of forces between them by means of a staggered configuration of the butts thereof to increase the contact surface between both boards, allowing the mutual coupling thereof, both being aligned and coplanar, and at least one of the steps of both boards having a finger profile to further increase the contact surface between both boards.

A set including a first panel, a second panel and a mechanical locking device for locking the first panel to the second panel, wherein the first panel includes a first main plane, and a first edge surface, the second panel includes a second edge surface, the first edge surface is facing the second edge surface at a junction plane in a locked position of the first and the second panel, the mechanical locking device includes at least one rod-shaped element at the first edge surface, at least one insertion groove at the second edge surface, the rod-shaped element is configured to be inserted into the insertion groove, the mechanical locking device further including at least one locking groove at the first or second edge surface and at least one locking part, the locking part is configured to be inserted into the locking groove and lock against the locking surface.

The present invention relates to a structural joint for attaching two boards by their butts, achieving the correct transmission of forces between them by means of a staggered configuration of the butts thereof to increase the contact surface between both boards, allowing the mutual coupling thereof, both being aligned and coplanar, and at least one of the steps of both boards having a finger profile to further increase the contact surface between both boards.