Patent ID: 7506481
Filing Date: 2009-03-24
Classification: E04B,E04F

Abstract:
1. A building board made of OSB (oriented strand board) which can be laid on beams, which are spaced apart parallel to one another, in order to form a subfloor in a residential or commercial building and which has two mutually opposite longitudinal edges and two mutually opposite transverse edges running at right angles to the longitudinal edges, one longitudinal edge and one transverse edge in each case having a tongue and the opposite longitudinal edge and transverse edge having a groove corresponding to the tongue, via which a plurality of building boards can be connected to one another and locked in the vertical direction in relation to one another, wherein the tongue on the longitudinal edge comprises a bevel and a recess adjacent the bevel, wherein the bevel transitions into a flat surface of the recess, and the tongue and the groove on the longitudinal edge are designed such that two boards which are connected to one another at the longitudinal edges are also locked in a horizontal direction in relation to one another, wherein the groove on the longitudinal edge is bounded by a top lip and a bottom lip, the bottom lip projects laterally beyond the top lip and has a concave recess over the entire length, and the tongue has a convex underside which corresponds to the recess, and the bevel is a flat or planar and is conterminous with the convex underside of the tongue, the recess is defined by the flat surface and a curved surface formed in the tongue, in an assembled state, an edge of the top lip of a first said building board bounds the recess of a second said building board forming a closed space, an underside of the top lip comprises a beveled edge corresponding to the bevel, and the longitudinal edges and the transverse edges have a chamfer on their top side, with the result that a V-shaped joint is formed at the connecting location between two boards.