Sep 12, 2016
Differential Shrinkage and the Cupping of Lumber
Wood shrinkage is often calculated with the assumption that the radial and tangential shrinkage occurs parallel to the surfaces of either flatsawn or quartersawn lumber. As a result, the calculated shrinkage has a built-in error in calculating the change in dimension since it ignores the curvilinear nature of the growth rings. An Excel spreadsheet model…