1. United States Department of Agriculture Forest Service Forest Products Laboratory, 1 Gifford Pinchot Dr., Madison, WI 53726, USA (Corresponding author) e-mail: sverrill@fs.fed.us, http://orcid.org/0000-0001-7627-9712
2. Department of Sustainable Bioproducts, Box 9820, Mississippi State, Starkville, MS 39762, USA
3. American Lumber Standard Committee, 7470 New Technology Way, Suite F, Frederick, MD 21703, USA
4. Southern Pine Inspection Bureau, PO Box 10915, Pensacola, FL 32524, USA