Plywood laminate having improved dimensional stability and resistance to warping and delamination

A plywood laminate comprising an even number of plies and an adhesive interposed between the adjacent plies adhering the plies together, the plies comprising a plurality of higher grade wood plies and a plurality of lower grade wood plies, the laminate comprising two opposed plies having an exposed major surface and at least two interior plies having no major surface exposed, the direction of the grain of adjacent plies being substantially perpendicular to each other, whereby a first plurality of plies has grain in a first direction and a second plurality of plies has grain in a second direction substantially perpendicular to the direction of the grain in the first plurality, the opposed plies being plies from the plurality of higher grade plies, and the plurality of lower grade plies including at least one interior ply from the first plurality of plies and at least one interior ply from the second plurality of plies.

A plywood laminate comprising a plurality of at least four wood plies, a first plurality of plies having a grain in a first direction and a second plurality of plies having a grain in a second direction substantially perpendicular to the direction of the grain in the first plurality, the plies having exposed major surfaces comprising plies from the first plurality of plies, the grain of the exposed plies being substantially parallel to the lengthwise edge of the ply, the wood plies comprising a plurality of higher quality plies and a plurality of lower quality plies, the exposed plies comprising plies from the plurality of higher quality plies, the ply adjacent one of the exposed plies being a lower quality ply, and the next adjacent ply being a lower quality ply.

A plywood laminate comprising two opposed wood plies and a plurality of interior wood plies interposed between the two opposed plies, the wood plies comprising a plurality of higher quality plies and at least one lower quality ply, the laminate further comprising a click-lock tongue and groove, the tongue having an upper surface and a lower surface spaced from the upper surface, at least one adhesive layer being interposed between the upper surface and the lower surface of the tongue, the tongue comprising a portion of at least one ply having a higher quality.

A plywood laminate comprising a plurality of plies, at least one edge configuration of the plywood laminate being selected from the group consisting of a tongue edge configuration and a groove configuration, wherein the edge configuration when mated with the edge configuration of a second plywood laminate forms a click-lock connection, the edge configuration including a projection, the thickness of the projection being greater than the thickness of each of the plies.

A plywood laminate comprising a plurality of plies, at least one edge configuration of the plywood laminate being selected from the group consisting of a tongue edge configuration and a groove configuration, wherein the edge configuration when mated with the edge configuration of a second plywood laminate forms a click-lock connection, the edge configuration including a projection, the projection comprising portions of at least three plies.