Method for adjusting warp measurements to a different board dimension

William T. Simpson; John R. Shelly

doi:10.2737/FPL-RN-273

Treesearch

Method for adjusting warp measurements to a different board dimension

Informally Refereed

Authors:

William T. Simpson, John R. Shelly

Year:

2000

Type:

Research Note

Station:

Forest Products Laboratory

DOI:

https://doi.org/10.2737/FPL-RN-273

Source:

(Research note FPL ; RN-0273):3 p. : ill. ; 28 cm.

Download (PDF 105 KB)

Download (PDF 105 KB): https://research.fs.usda.gov/download/treesearch/5917.pdf

Abstract

Warp in lumber is a common problem that occurs while lumber is being dried. In research or other testing programs, it is sometimes necessary to compare warp of different species or warp caused by different process variables. If lumber dimensions are not the same, then direct comparisons are not possible, and adjusting warp to a common dimension would be desirable so that these comparisons are possible. In this report, two methods of adjusting warp to different dimensions are developed2one based on the geometry of bow and crook and another based on the geometry of twist. These methods provide a way to adjust crook and bow measurements to a different length and to adjust twist to a different length or width so that comparisons are possible.

Keywords

Lumber--Drying, Wood--Preservation, Lumber, Wood products, Kiln drying, Warping, Wood defects, Measurement, Dimensions, Adjustment, Methodology

Citation

Simpson, William T.; Shelly, John R. 2000. Method for adjusting warp measurements to a different board dimension. (Research note FPL ; RN-0273):3 p. : ill. ; 28 cm.