1. Member, ASCE
2. Res. General Engr., Forest Products Lab., U.S. Dept. of Agr. Forest Service, 1 Gifford Pinchot Dr., Madison, WI 53705 (corresponding author). E-mail: drammer@fs.fed.us
3. Vice Pres. of Operation, TECO Corporation, 2402 Daniels Street, Madison, WI 53718.
4. Prof., Washington State Univ., Pullman, WA 99164.