Different Methods of Taking Lumber Out of Wind
Abstract
Abstract Boards are generally sawed out of the green log, and although as they come off the saw carriage they are quite straight, the saw has cut some fibers crosswise, others longitudinally, or across the grain in knot formations. The strains and stresses under which the cells adjacent to the saw were confined are now released, and the exposed surfaces of the board absorb moisture or lose it, this producing warp or wind in the lumber. In the drying of this lumber the fibrous cells often become rearranged, warping it out of shape. This condition is not objectionable for certain building applications such as baseboards and trim, where the stock is nailed in place, but when making furniture, musical cabinets, case goods, etc., it is important that the permanency of the joints be assured. For this reason machinery has been devised to overcome the warp or wind in boards to be used in these ways. The paper describes these mechanical processes.
Reference
Armen S. Kurkjian. (1933). Different Methods of Taking Lumber Out of Wind. Journal of Fluids Engineering. https://doi.org/10.1115/1.4022542
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