NEWS & RESOURCES
The deviation of grain direction from the longitudinal axis of a piece of wood or from the stem axis in a tree. Pronounced deviation from the surface, especially in veneer, is termed short grain.
Transverse planes of failure in tension parallel to the grain, caused by localized abnormal longitudinal shrinkage restrained by adjacent normal wood.
In plywood with more than three piles, the veneers immediately beneath the faces, having grain direction perpendicular to that of the faces.
A lumber defect where an edgewise warp effects the straightness of the board. The distortion of a board in which there is a deviation, in a direction perpendicular to the edge, from a straight line from end to end of the piece.
A time-dependent deformation of a wood member or adhesive joint due to sustained stress.
A large radial check resulting from greater tangential than radial shrinkage.
The flattening of single cells or a row of cells in hardwood during the drying or pressure treatment of wood characterized externally by a caved-in or corrugated appearance.
A bonding operation in which an assembly is subjected to pressure without the application of heat.