Abstract: A composite wood panel is disclosed, the wood panel having parallel first and second longitudinal edges, and parallel upper and lower faces, and comprising: a groove formed along the second longitudinal edge, a complementary shaped tongue formed along the first longitudinal edge, and a barrier layer. A first surface extends from the tongue to the upper surface and forms a generally obtuse angle, ?, with the upper surface, while a matching surface extends from the groove forming a generally acute angle, ?, with the upper surface, and the sum of ? and ? is from about 175° to less than about 180°. The composite wood panel allows for convenient and fast assembly, particularly in constructing roofs, and also provides resistance against the penetration of water through the structure formed by the panels.

Abstract: A load transfer device (LTD) allowing for reliable connection and linkage of composite wood boards is provided. A LTD is configured for containment within openings within peripheral edges of wood boards which are cut into a complementary shape to that of the device. The device, when assembled in panel openings, permits separation of adjacent boards, as well as, sufficient load bearing strength for the overall construction within which such connected wood boards are utilized. The separation of wood boards permits proper sealing therebetween and proper distance for shrinking or swelling during the lifetime of the edifice. The ability to impart increased load bearing strength allows for an increase in construction materials to be carried and kept on such a structure during construction. The method of manufacture of a structure utilizing load transfer devices between boards is also disclosed.

Abstract: A composite wood panel is disclosed, the wood panel having parallel first and second longitudinal edges, and parallel upper and lower faces, and comprising: a groove formed along the second longitudinal edge, a complementary shaped tongue formed along the first longitudinal edge, and a barrier layer. A first surface extends from the tongue to the upper surface and forms a generally obtuse angle, &agr;, with the upper surface, while a matching surface extends from the groove forming a generally acute angle, &bgr;, with the upper surface, and the sum of &agr; and &bgr; is from about 175° to less than about 180°. The composite wood panel allows for convenient and fast assembly, particularly in constructing roofs, and also provides resistance against the penetration of water through the structure formed by the panels.

Abstract: A composite wood panel is disclosed, the wood panel having parallel first and second longitudinal edges, and parallel upper and lower faces, and comprising: a groove formed along the second longitudinal edge, a complementary shaped tongue formed along the first longitudinal edge, and a barrier layer. A first surface extends from the tongue to the upper surface and forms a generally obtuse angle, &agr;, with the upper surface, while a matching surface extends from the groove forming a generally acute angle, &bgr;, with the upper surface, and the sum of &agr; and &bgr; is from about 175° to less than about 180°. The composite wood panel allows for convenient and fast assembly, particularly in constructing roofs, and also provides resistance against the penetration of water through the structure formed by the panels.

Abstract: A rectangular composite wood board includes along each of its long edges an alternating tongue and groove construction, the tongue being insertable into a similarly shaped groove. In one embodiment, each of the short edges of the board is in contact with a groove at one end and a tongue end at the other, and each of the long edges includes an equal number of tongues and grooves. In another embodiment, each of the long edges has a groove at each of its ends and the grooves are equal to or longer than the longitudinal length of a tongue.

Abstract: A composite wood panel is disclosed, the wood panel having parallel first and second longitudinal edges, and parallel upper and lower faces, and comprising: a groove formed along the second longitudinal edge, a complementary shaped tongue formed along the first longitudinal edge, and a barrier layer. A first surface extends from the tongue to the upper surface and forms a generally obtuse angle, &agr;, with the upper surface, while a matching surface extends from the groove forming a generally acute angle, &bgr;, with the upper surface, and the sum of &agr; and &bgr; is from about 175° to less than about 180°. The composite wood panel allows for convenient and fast assembly, particularly in constructing roofs, and also provides resistance against the penetration of water through the structure formed by the panels.